$ git clone -n https://src.fedoraproject.org/rpms/libxfce4ui.git /var/lib/mock/f45-build-17334-498/root/chroot_tmpdir/scmroot/libxfce4ui
Cloning into '/var/lib/mock/f45-build-17334-498/root/chroot_tmpdir/scmroot/libxfce4ui'...
$ git fetch origin 6e33c3f63fa88842c226042e30fd293b570fa53c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libxfce4ui
 * [new ref]         6e33c3f63fa88842c226042e30fd293b570fa53c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e33c3f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild