bug#33328: 27.0.50; Extend Emacs bug report

[Eli Zaretskii]

> From: Glenn Morris <rgm@gnu.org>
> Date: Thu, 22 Nov 2018 13:52:58 -0500
> Cc: 33328@debbugs.gnu.org
> 
> Thanks for the example, name-rev clearly isn't doing what I thought. I
> would still think the branch information would be derivable from the
> hash, eg https://github.com/mhagger/git-when-merged , but clearly it's
> not so simple.

Branches mean nothing to Git.