Ref T182. This doesn't do anything interesting yet and is mostly scaffolding, but here's roughly the workflow. From previous revision, you can configure "Repository Automation" for a repository:
If it's configured, a new "Land Revision" button shows up:
Once you click it you get a big warning dialog that it won't work, and then this shows up at the top of the revision (completely temporary/placeholder UI, some day a nice progress bar or whatever):
If you're lucky, the operation eventually sort of works:
It only runs git show right now, doesn't actually do any writes or anything.