$ git clone -n https://src.fedoraproject.org/rpms/system-config-printer.git /var/lib/mock/f29-build-4249-1022/root/thebuilddir/tmp/scmroot/system-config-printer
Cloning into '/var/lib/mock/f29-build-4249-1022/root/thebuilddir/tmp/scmroot/system-config-printer'...
$ git reset --hard 3aeb4cf6cb5eb644b574101b3915e30c4a3f1344
HEAD is now at 3aeb4cf gcc is no longer in buildroot by default