I've implemented this too. You take a branch of the mainline, work on your feature, integrate mainline if it has moved on in the meantime. When your ready to su

I've implemented this too. You take a branch of the mainline, work on your feature, integrate mainline if it has moved on in the meantime. When your ready to submit you tell one of the reviewers. They checkout your branch, do a diff and if it's good they submit. If they have questions you talk about it and if something is not right or missing, they get told to add it. It stops lazy check ins and it means at least 2 people know what code has gone in recently.