And its friend, "git rebase -i --autosq" for when you knew at commit time that you needed to fold a fix into an earlier commit, by setting the commit message as

And its friend, "git rebase -i --autosq" for when you knew at commit time that you needed to fold a fix into an earlier commit, by setting the commit message as "fixup! cafebabedeadbeef" or "fixup! the old commit message" (but I have less experience with the latter form)