Tried to process a deleted commit, saw a new message:
```
2016-07-11 9:30:22 AM [STDE] <VERB> PhabricatorTaskmasterDaemon Task 1428658 was cancelled: Commit "R55:6c46b7d0fb82a859ca3f87a95dc8dcceef8088c9" (with internal ID "282161") is no longer reachable from any branch, tag, or ref in this repository, so it will not be imported. This usually means that the branch the commit was on was deleted or overwritten.
```