$ git clone -n https://src.fedoraproject.org/rpms/xeus.git /var/lib/mock/f39-build-2036582-48020/root/chroot_tmpdir/scmroot/xeus
Cloning into '/var/lib/mock/f39-build-2036582-48020/root/chroot_tmpdir/scmroot/xeus'...
$ git fetch origin 468f62bc99fb9ae4895a883e97e23fe74475ccf4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xeus
 * [new ref]         468f62bc99fb9ae4895a883e97e23fe74475ccf4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 468f62b Update to latest version (#2252266)