$ git clone -n https://src.fedoraproject.org/rpms/lxmenu-data.git /var/lib/mock/f45-build-17818-504/root/chroot_tmpdir/scmroot/lxmenu-data
Cloning into '/var/lib/mock/f45-build-17818-504/root/chroot_tmpdir/scmroot/lxmenu-data'...
$ git fetch origin 3a81f7a550cbffe00fce626a1bb2cb6830c3148c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxmenu-data
 * [new ref]         3a81f7a550cbffe00fce626a1bb2cb6830c3148c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a81f7a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild