I recently started using `git commit --fixup` which I really like. It lets you take the current changes and apply them to a commit which is not the most recent (in a fairly roundabout way). It's good for when I have a stack of diffs and want to make changes to multiple commits at once. (Note this is a pretty advanced technique, if you're not super comfortable with `git rebase -i` I wouldn't bother even trying to understand `--fixup`)

https://fle.github.io/git-tip-keep-your-branch-clean-with-fi...