Git rebase is a Git command that replays commits from one branch onto a newer base commit. It creates new versions of those commits, which can make a project’s history easier to read. Because it rewrites commit history, it is safest for private work that has not been shared with others.
Git Rebase
What Is Git Rebase?
Git rebase replays commits from one branch onto a newer base commit. It creates replacement commits, producing a straighter history. A commit is a saved set of changes, a branch is a separate line of work, and the base is where that work begins.
How Git Rebase Works
Rebasing updates a feature branch with changes from another branch, often main.
- Git finds the branches’ common ancestor.
- It temporarily saves commits only on the current branch.
- It moves the branch to the latest target commit.
- It reapplies saved changes as new commits.
- If changes overlap, Git pauses for conflict resolution.
Git Rebase vs. Git Merge
Neither is always better. Choose based on whether history is private or shared.
| Area | Rebase | Merge |
|---|---|---|
| History shape | Linear | Shows branch joins |
| Existing commits | Rewritten | Preserved |
| Merge commit | Usually none | Often created |
| Best use | Private feature branches | Shared branch history |
Benefits of Git Rebase
Rebase can make a branch easier to review.
- Creates a clean, linear commit log.
- Lets developers resolve integration conflicts before a pull request.
- Helps reviewers follow a focused feature’s changes.
- Supports coherent commits before sharing work.
Practical Limits and Risks of Rebasing
Git rebase changes commit identities and needs care.
- Rebasing public or shared commits can disrupt collaborators who based work on them.
- A conflict may appear more than once as Git replays commits.
- A successful rebase does not prove the application works, so testing remains necessary.
How to Rebase a Branch Safely
Use this workflow for a feature branch you own or your team has agreed to rewrite.
- Confirm the working tree is clean with
git status. - Fetch remote changes with
git fetch. - Create a backup branch before rewriting history.
- Run
git rebase main, replacingmainwhen needed. - Resolve conflicts, stage fixes, then run
git rebase --continue. - Run tests and inspect the log.
- If previously pushed, use
git push --force-with-lease, not an unrestricted force push.
Interactive Rebase for Cleaning Up Local Commits
git rebase -i opens an editable list of local commits. Before sharing a branch, developers can reword messages, squash related commits, fix up corrections, reorder commits, edit a commit, or drop one. Use it as a final history-editing pass, not a replacement for clear commits during development.
Undoing a Git Rebase
Cancel an in-progress rebase with git rebase --abort. After a completed local rebase, git reflog can often identify the earlier branch position, while a backup branch provides a simpler recovery point.
Git Rebase in an Emergent Workflow
Disciplined Git history helps teams trace, test, and ship changes confidently. Emergent supports delivery workflows that connect code work to a GitHub integration, while its guide to GitHub-connected documentation shows how repository activity can stay understandable. Build well-managed apps with Emergent.
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