$ git clone -n https://src.fedoraproject.org/rpms/libxfce4ui.git /var/lib/mock/f40-build-796864-140979/root/chroot_tmpdir/scmroot/libxfce4ui
Cloning into '/var/lib/mock/f40-build-796864-140979/root/chroot_tmpdir/scmroot/libxfce4ui'...
$ git fetch origin a870ec378abb35c950de0ce39b3f9d115ae753f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libxfce4ui
 * [new ref]         a870ec378abb35c950de0ce39b3f9d115ae753f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a870ec3 Update to 4.18.6