[deredede]

> It's not actually how code reviews are done by the people who wrote it.

What do you mean by that? Even if you do review by emailing patchsets those are still managed locally using branches, to my knowledge.

[packetlost]

I mean the unit of review is the patch (set), which does not necessarily have a branch associated with it. You can use a branch, but you could just as easily send commits from master and the reviewer can apply them directly on their master branch if desired. The idea of "branch per reviewable unit" was largely created by GitHub.