I share with fiatjaf's sentiment; this is an amazingly cool piece of hackery (that will probably be very useful to many people), but I won't use it.
For those simple types of changes, I like to amend the original commit, rather than make a new one. Of course, I come from using `git send-email` to send patches to a mailing list, where you are expected to send "[PATCH v2]" after you get feedback.