$ git clone -n https://src.fedoraproject.org/rpms/xgamma.git /var/lib/mock/f45-build-38895-730/root/chroot_tmpdir/scmroot/xgamma
Cloning into '/var/lib/mock/f45-build-38895-730/root/chroot_tmpdir/scmroot/xgamma'...
$ git fetch origin 0f35e5c11ec456b4ad28bdfe8a60661744773857:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xgamma
 * [new ref]         0f35e5c11ec456b4ad28bdfe8a60661744773857 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0f35e5c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild