$ git clone -n https://src.fedoraproject.org/rpms/gom.git /var/lib/mock/f41-build-813552-148686/root/chroot_tmpdir/scmroot/gom
Cloning into '/var/lib/mock/f41-build-813552-148686/root/chroot_tmpdir/scmroot/gom'...
$ git fetch origin be7993d2f49c41ce8446cfe521ddf1bb2e751b76:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gom
 * [new ref]         be7993d2f49c41ce8446cfe521ddf1bb2e751b76 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at be7993d Update to 0.5.2