koji question -- why does this build not show a specific git commit?

[Mike Bonnet]

On 06/05/2015 11:07 AM, Matthew Miller wrote:
> On Fri, Jun 05, 2015 at 05:05:06PM +0200, Pavol Babincak wrote:
>>> just has "HEAD", which is less useful since that moves. I see that it's
>> >from a chainbuild, but when I look at the list of chainbuilds, I see
>>> that most of those appear to use specific commits too. What's
>>> special/weird about this one?
>> Koji shows it in a way how the task was submitted. In this case
>> giturl was constructed with HEAD as git reference.
>
> I guess that's obvious in retrospect. :) How does that happen? Is it
> _supposed_ to happen? Can we stop it? Should we?

We can't stop it currently, but we should probably be able to write 
policy to prevent it, at least for non-scratch builds.