Is there builtin functionality for what would amount to:
```arc pull D##```
I am helping migrate some mercurial repositories to Phabricator, but a sticking point is properly implementing our pull request workflow.
Some repositories are tightly controlled and non-pushable except by a few users. When running
```arc patch D###```
to apply the patch prior to
```hg push```
Arcanist create a new commit message which then invalidates the hash of the commit submitted for differential by the user, and interjects additional information into the commit message that we don't want.
Is there a way, I can pull from the differential revision and then push.
IE: arc pull