$ git clone -n https://src.fedoraproject.org/rpms/xeus.git /var/lib/mock/f39-build-1668755-40834/root/chroot_tmpdir/scmroot/xeus
Cloning into '/var/lib/mock/f39-build-1668755-40834/root/chroot_tmpdir/scmroot/xeus'...
$ git fetch origin 14b0072979e2f9f2f7f92e8544dc1fe3cb1acc59:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xeus
 * [new ref]         14b0072979e2f9f2f7f92e8544dc1fe3cb1acc59 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14b0072 Update to latest version (#2240272)