The following version of pwclient adds 'branch' command.  You use it so:

  pw branch 15

This does the following:

  1. Download patch #15.

  2. Find the last master branch commit of the night before
     that patch was submitted (best chance to apply there).

  3. Create a local topic branch named t/patch15.

  4. Apply this patch to that topic branch.

  5. Leave you in the topic branch so you can work on the patch.
     Use git commit --amend if you want to edit the commit message.

John