The Phabricator instance I have where I'm working was original pointed at the root of our repo. There is a whole heap of things around the trunk and branches folder that are really noisy and should never have been imported.
There is no facailicty to delete commits directly (because they don't implement the destructible interface, so is there some query you could help me write to delete this junk data that is taking up a lot of space on our DB/server?