You could actually do that today with the Git model if you want to, so, arguably, the question is, why doesn't your code review tool already put its history in

You could actually do that today with the Git model if you want to, so, arguably, the question is, why doesn't your code review tool already put its history in git? (Probably some combination of nobody asking for it, and in some cases, wanting to keep your code review process locked in to the tool.)