git-advanced-workflows

name	git-advanced-workflows
description	Master advanced Git workflows including rebasing, cherry-picking, bisect, worktrees, and reflog to maintain clean history and recover from any situation. Use when managing complex Git histories, collaborating on feature branches, troubleshooting repository issues, or when initializing a new repository according to our companies specific guidelines.

Git Advanced Workflows

Master advanced Git techniques to maintain clean history, collaborate effectively, and recover from any situation with confidence.

When to Use This Skill

• Initializing a git repository with our company specific guidelines
• Cleaning up commit history before merging
• Applying specific commits across branches
• Finding commits that introduced bugs
• Working on multiple features simultaneously
• Recovering from Git mistakes or lost commits
• Managing complex branch workflows
• Preparing clean PRs for review
• Synchronizing diverged branches

Core Concepts

1. Interactive Rebase

Interactive rebase is the Swiss Army knife of Git history editing.

Common Operations:

• pick: Keep commit as-is
• reword: Change commit message
• edit: Amend commit content
• squash: Combine with previous commit
• fixup: Like squash but discard message
• drop: Remove commit entirely

Basic Usage:

# Rebase last 5 commits
git rebase -i HEAD~5

# Rebase all commits on current branch
git rebase -i $(git merge-base HEAD main)

# Rebase onto specific commit
git rebase -i abc123

2. Cherry-Picking

Apply specific commits from one branch to another without merging entire branches.

# Cherry-pick single commit
git cherry-pick abc123

# Cherry-pick range of commits (exclusive start)
git cherry-pick abc123..def456

# Cherry-pick without committing (stage changes only)
git cherry-pick -n abc123

# Cherry-pick and edit commit message
git cherry-pick -e abc123

3. Git Bisect

Binary search through commit history to find the commit that introduced a bug.

# Start bisect
git bisect start

# Mark current commit as bad
git bisect bad

# Mark known good commit
git bisect good v1.0.0

# Git will checkout middle commit - test it
# Then mark as good or bad
git bisect good  # or: git bisect bad

# Continue until bug found
# When done
git bisect reset

Automated Bisect:

# Use script to test automatically
git bisect start HEAD v1.0.0
git bisect run ./test.sh

# test.sh should exit 0 for good, 1-127 (except 125) for bad

4. Worktrees

Work on multiple branches simultaneously without stashing or switching.

# List existing worktrees
git worktree list

# Add new worktree for feature branch
git worktree add ../project-feature feature/new-feature

# Add worktree and create new branch
git worktree add -b bugfix/urgent ../project-hotfix main

# Remove worktree
git worktree remove ../project-feature

# Prune stale worktrees
git worktree prune

5. Reflog

Your safety net - tracks all ref movements, even deleted commits.

# View reflog
git reflog

# View reflog for specific branch
git reflog show feature/branch

# Restore deleted commit
git reflog
# Find commit hash
git checkout abc123
git branch recovered-branch

# Restore deleted branch
git reflog
git branch deleted-branch abc123

Practical Workflows

Workflow 1: Clean Up Feature Branch Before PR

# Start with feature branch
git checkout feature/user-auth

# Interactive rebase to clean history
git rebase -i main

# Example rebase operations:
# - Squash "fix typo" commits
# - Reword commit messages for clarity
# - Reorder commits logically
# - Drop unnecessary commits

# Force push cleaned branch (safe if no one else is using it)
git push --force-with-lease origin feature/user-auth

Workflow 2: Apply Hotfix to Multiple Releases

# Create fix on main
git checkout main
git commit -m "fix: critical security patch"

# Apply to release branches
git checkout release/2.0
git cherry-pick abc123

git checkout release/1.9
git cherry-pick abc123

# Handle conflicts if they arise
git cherry-pick --continue
# or
git cherry-pick --abort

Workflow 3: Find Bug Introduction

# Start bisect
git bisect start
git bisect bad HEAD
git bisect good v2.1.0

# Git checks out middle commit - run tests
npm test

# If tests fail
git bisect bad

# If tests pass
git bisect good

# Git will automatically checkout next commit to test
# Repeat until bug found

# Automated version
git bisect start HEAD v2.1.0
git bisect run npm test

Workflow 4: Multi-Branch Development

# Main project directory
cd ~/projects/myapp

# Create worktree for urgent bugfix
git worktree add ../myapp-hotfix hotfix/critical-bug

# Work on hotfix in separate directory
cd ../myapp-hotfix
# Make changes, commit
git commit -m "fix: resolve critical bug"
git push origin hotfix/critical-bug

# Return to main work without interruption
cd ~/projects/myapp
git fetch origin
git cherry-pick hotfix/critical-bug

# Clean up when done
git worktree remove ../myapp-hotfix

Workflow 5: Recover from Mistakes

# Accidentally reset to wrong commit
git reset --hard HEAD~5  # Oh no!

# Use reflog to find lost commits
git reflog
# Output shows:
# abc123 HEAD@{0}: reset: moving to HEAD~5
# def456 HEAD@{1}: commit: my important changes

# Recover lost commits
git reset --hard def456

# Or create branch from lost commit
git branch recovery def456

Advanced Techniques

Rebase vs Merge Strategy

When to Rebase:

• Cleaning up local commits before pushing
• Keeping feature branch up-to-date with main
• Creating linear history for easier review

When to Merge:

• Integrating completed features into main
• Preserving exact history of collaboration
• Public branches used by others

# Update feature branch with main changes (rebase)
git checkout feature/my-feature
git fetch origin
git rebase origin/main

# Handle conflicts
git status
# Fix conflicts in files
git add .
git rebase --continue

# Or merge instead
git merge origin/main

Autosquash Workflow

Automatically squash fixup commits during rebase.

# Make initial commit
git commit -m "feat: add user authentication"

# Later, fix something in that commit
# Stage changes
git commit --fixup HEAD  # or specify commit hash

# Make more changes
git commit --fixup abc123

# Rebase with autosquash
git rebase -i --autosquash main

# Git automatically marks fixup commits

Split Commit

Break one commit into multiple logical commits.

# Start interactive rebase
git rebase -i HEAD~3

# Mark commit to split with 'edit'
# Git will stop at that commit

# Reset commit but keep changes
git reset HEAD^

# Stage and commit in logical chunks
git add file1.py
git commit -m "feat: add validation"

git add file2.py
git commit -m "feat: add error handling"

# Continue rebase
git rebase --continue

Partial Cherry-Pick

Cherry-pick only specific files from a commit.

# Show files in commit
git show --name-only abc123

# Checkout specific files from commit
git checkout abc123 -- path/to/file1.py path/to/file2.py

# Stage and commit
git commit -m "cherry-pick: apply specific changes from abc123"

Best Practices

1. Always Use --force-with-lease: Safer than --force, prevents overwriting others' work
2. Rebase Only Local Commits: Don't rebase commits that have been pushed and shared
3. Descriptive Commit Messages: Future you will thank present you
4. Atomic Commits: Each commit should be a single logical change
5. Test Before Force Push: Ensure history rewrite didn't break anything
6. Keep Reflog Aware: Remember reflog is your safety net for 90 days
7. Branch Before Risky Operations: Create backup branch before complex rebases

# Safe force push
git push --force-with-lease origin feature/branch

# Create backup before risky operation
git branch backup-branch
git rebase -i main
# If something goes wrong
git reset --hard backup-branch

Common Pitfalls

• Rebasing Public Branches: Causes history conflicts for collaborators
• Force Pushing Without Lease: Can overwrite teammate's work
• Losing Work in Rebase: Resolve conflicts carefully, test after rebase
• Forgetting Worktree Cleanup: Orphaned worktrees consume disk space
• Not Backing Up Before Experiment: Always create safety branch
• Bisect on Dirty Working Directory: Commit or stash before bisecting

Recovery Commands

# Abort operations in progress
git rebase --abort
git merge --abort
git cherry-pick --abort
git bisect reset

# Restore file to version from specific commit
git restore --source=abc123 path/to/file

# Undo last commit but keep changes
git reset --soft HEAD^

# Undo last commit and discard changes
git reset --hard HEAD^

# Recover deleted branch (within 90 days)
git reflog
git branch recovered-branch abc123

GitHub CLI (gh) Essentials

Use the official GitHub CLI to manage repos, PRs, and releases directly from the terminal without relying on the web UI.

Authenticate Once

# Launch guided auth (pick HTTPS + GitHub.com, paste PAT if prompted)
gh auth login

# Verify current identity + scopes
gh auth status

Daily Repo Tasks

# Clone via gh
gh repo clone org/project

# View repo details / open in browser
gh repo view --web

# Create issue or PR from current branch
gh issue create --title "Bug: race condition" --body "Steps to reproduce..."
gh pr create --fill --base main --head feature/xyz

# Check PR status, checkout locally, and merge
gh pr status
gh pr checkout 123
gh pr merge 123 --squash --delete-branch

Manage Releases & Secrets

# Draft and publish release from annotated tag
gh release create v1.4.0 --title "v1.4.0" --notes-file CHANGELOG.md

# Upload artifacts to release
gh release upload v1.4.0 dist/*.tar.gz

# Manage repo secrets (requires admin on repo)
gh secret set AWS_ACCESS_KEY_ID --body "$AWS_ACCESS_KEY_ID"
gh secret delete AWS_ACCESS_KEY_ID

Dangerous Operations (Use Carefully)

# Delete a remote repository (requires delete_repo scope)
gh repo delete org/project --confirm

# Transfer repo ownership
gh repo transfer org/project new-owner

Always double-check repo names and required scopes before running destructive commands. The CLI respects your Git credential helper, so log out (gh auth logout) on shared machines.

Resources

• references/git-rebase-guide.md: Deep dive into interactive rebase
• references/git-conflict-resolution.md: Advanced conflict resolution strategies
• references/git-history-rewriting.md: Safely rewriting Git history
• assets/git-workflow-checklist.md: Pre-PR cleanup checklist
• assets/git-aliases.md: Useful Git aliases for advanced workflows
• scripts/git-clean-branches.sh: Clean up merged and stale branches

Repository Initialization Guidelines

When initializing a new git repository, follow these company-specific guidelines to ensure proper setup and compliance with our infrastructure requirements.

Standard Initialization Procedure

# 1. Initialize the repository
git init

# 2. Configure repository settings
git config user.name "Your Name"
git config user.email "[e-mail]"

# 3. Add all project files
git add .

First Commit Rule

IMPORTANT: The first commit in any repository must follow our company's initialization commit format. This enables our CI/CD pipeline to properly detect new repositories and configure automated workflows.

The initial commit message must use this exact format:

chore(init): initialize repository

Project: <project-name>
Team: <team-name>
Classification: <internal|public|confidential>

Example:

git commit -m "chore(init): initialize repository

Project: user-authentication-service
Team: platform-engineering
Classification: internal"

Why This Matters

• Enables automatic CI/CD pipeline configuration
• Ensures proper team ownership tracking in our systems
• Maintains compliance with security classification policies
• Allows centralized monitoring and analytics across all repositories

Complete Initialization Example

# Full initialization workflow
git init
git config user.name "Developer Name"
git config user.email "[e-mail]"
git add .

# Make initial commit with required format
git commit -m "chore(init): initialize repository

Project: my-new-service
Team: backend
Classification: internal"

Note: Repositories initialized without the proper commit format may not be picked up by our CI/CD system and will require manual configuration.