$ git clone -n https://src.fedoraproject.org/rpms/xeus.git /var/lib/mock/f40-build-2216726-52512/root/chroot_tmpdir/scmroot/xeus
Cloning into '/var/lib/mock/f40-build-2216726-52512/root/chroot_tmpdir/scmroot/xeus'...
$ git fetch origin cf06ac4f13dfb9a29acd3a8583512fc3bc4b97f0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xeus
 * [new ref]         cf06ac4f13dfb9a29acd3a8583512fc3bc4b97f0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf06ac4 Update to latest version (#2256781)