$ git clone -n https://src.fedoraproject.org/rpms/casync.git /var/lib/mock/f40-build-2234930-53414/root/chroot_tmpdir/scmroot/casync
Cloning into '/var/lib/mock/f40-build-2234930-53414/root/chroot_tmpdir/scmroot/casync'...
$ git fetch origin ce1c4bb4e92aa310065c0329f77b374e6f29eed5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/casync
 * [new ref]         ce1c4bb4e92aa310065c0329f77b374e6f29eed5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce1c4bb Convert license tag to SPDX