Updates lacking descriptions

[Jeff Garzik]

Richard W.M. Jones wrote:
> Now I agree that extending RPM to add metadata to mark the upstream
> changelog file or URL would be an excellent idea.  It's a one-off
> change to specfiles and means that we don't need to write the same
> thing in every update - a win all round.
> 
> Suggestions:
> 
>   %doc(changelog): ChangeLog.txt
>   Changelog-URL: http://example.com/changes.html

How would that work for changelogs stored in a git repository?

	Jeff