Change a Commit Message that Hasn‘t Been Pushed Yet

If you make a mistake in a commit message but HAVEN‘T pushed it yet, you can change that commit message with --amend:

git commit --amend -m "New message"

This won‘t change any of the files in your commit - but will rewrite the commit with the new message.

Add More Files and Changes to a Commit Before Pushing

To add more files to the most recent commit, we can add them to the staging area with:

git add -A

and then rewrite the most recent commit to include them with:

git commit --amend -m "My new message"

Caution: only do this BEFORE you‘ve pushed the commits - otherwise you will be re-writing history for people who may have already pulled down the old commits.

原文：https://www.cnblogs.com/Answer1215/p/12030073.html