$ git clone -n https://src.fedoraproject.org/rpms/libXtst.git /var/lib/mock/f40-build-2008932-45428/root/chroot_tmpdir/scmroot/libXtst
Cloning into '/var/lib/mock/f40-build-2008932-45428/root/chroot_tmpdir/scmroot/libXtst'...
$ git fetch origin ea868f3a700fdd567beeb5510e45f1635325ce89:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libXtst
 * [new ref]         ea868f3a700fdd567beeb5510e45f1635325ce89 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea868f3 SPDX migration