$ git clone -n https://src.fedoraproject.org/rpms/gobby.git /var/lib/mock/f29-build-6794-1674/root/thebuilddir/tmp/scmroot/gobby
Cloning into '/var/lib/mock/f29-build-6794-1674/root/thebuilddir/tmp/scmroot/gobby'...
$ git reset --hard c450378f467db299a241c1d64c7d121f01a70ed2
HEAD is now at c450378 - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild