$ git clone -n https://src.fedoraproject.org/rpms/gummi.git /var/lib/mock/f29-build-6177-1516/root/thebuilddir/tmp/scmroot/gummi
Cloning into '/var/lib/mock/f29-build-6177-1516/root/thebuilddir/tmp/scmroot/gummi'...
$ git reset --hard 09d2c6a451af13c8822ce211185121ca07111f30
HEAD is now at 09d2c6a - Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild