bug#33328: 27.0.50; Extend Emacs bug report

[Eli Zaretskii]

> From: Achim Gratz <Stromeko@nexgo.de>
> Date: Thu, 22 Nov 2018 20:14:56 +0100
> 
> Michael Albinus writes:
> > A version number is not sufficient. It depends, which branch is checked
> > out. See for example
> 
> It is quite useless to ask which branch a given commit is on, since it
> could be on any number of branches, only some of which might be shared
> between your repo and the repo of the reporter.

In general, yes.  But not in Emacs development, not with public
development branches anyway.