Keep original author with git merge --squash?

I frequently find myself using `git merge --squash` to combine a series of commits by the same author into one.

(For example, I fetch my project's GitHub PRs into my repo. Frequently, a PR consists of the original PR (with a good description) followed by a few follow-ups based on feedback from me. While I'd prefer that the submitter amended their original commit instead of making it my job, this is rare. And I don't feel that it's valuable to my project's git history to contain all the intermediate stages of code review --- it's usually just one commit.)

So `git merge --squash origin/pr/1234` is a really convenient command here... except for one thing: it sets the author as me. I always have to manually find the author line and make sure to pass it to --author (perhaps with --amend).

What would people think of a flag (or a config value) that means "if all merged commits are by the same author, use that author for the resulting commit instead of the default author"?

(I'm not sure if this should be a flag to --squash or to commit. Maybe `git merge --squash`; `git commit --use-squashed-author`? Seems like it should be not too hard to implement; SQUASH_MSG is pretty parseable. Or just a config value.)

--dave