Odd. It seems like it commited to master fine, but for some reason the build never happened.
You should be able to just do a 'fedpkg build' in master and things should be back on track.
I thought so, and just did that, and it built fine:
http://koji.fedoraproject.org/koji/buildinfo?buildID=577111
Hopefully it's a one-off and not part of a bigger problem...
Thanks,
Richard