Re: Obscure error/warning/information message from git pull

[Eli Zaretskii]

> From: David Engster <address@hidden>
> Date: Sat, 15 Nov 2014 00:17:49 +0100
> Cc: Sergey Organov <address@hidden>, address@hidden
> 
> Alan Mackenzie writes:
> > I want to see all recent commits together, each one annotated with
> > which branch it's on.  That's surely not too much to ask for.  I want
> > annotation, not filtering.
> 
> Try
> 
>   git log --source emacs-24 master

This spews an error message when invoked in the master branch.  Why?
Does it need the repository to track both branches or something?

What exactly is the semantics of this command when given branch names?
(The man page doesn't say, AFAICS.)