$ git clone -n https://src.fedoraproject.org/rpms/gerbera.git /var/lib/mock/f45-build-9767-408/root/chroot_tmpdir/scmroot/gerbera
Cloning into '/var/lib/mock/f45-build-9767-408/root/chroot_tmpdir/scmroot/gerbera'...
$ git fetch origin 4cd24e682f5cb9692842dee052fc8b35f324c024:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gerbera
 * [new ref]         4cd24e682f5cb9692842dee052fc8b35f324c024 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4cd24e6 libupnp rebuild