Junio C Hamano [off-list ref] wrote:
Chris, do you remember if there was a reason why it was a bad idea
to teach the normal rebase codepath to handle "--root"? I think we
would have needed to allow "am" to apply a creation patch and start
a new history on an unborn branch in order to do so, but I am not
sure if there was a valid reason why such a change to "am" would
have been a bad idea.
Hi. It's a long time ago, but I don't remember any reason and it feels
sensible that am should be able to create an unborn branch in the same way
interactive rebase can.
I suspect I had done the necessary work for rebase -i but not for am, and
incorrectly assumed that interactive rebase was in any case a superset of
non-interactive.
Best wishes,
Chris.