--amend if you have a modification to your most recent commit. --fixup if you have a modification to an earlier commits rebase --autosquash amend the fixup(s)

--amend if you have a modification to your most recent commit. --fixup if you have a modification to an earlier commits rebase --autosquash amend the fixup(s) to the commit(s) they belong too. (Of course you need to know what you doing. Otherwise you create conficts tedious to resolve in the rebase)