$ git clone -n https://src.fedoraproject.org/rpms/mate-menu.git /var/lib/mock/f45-build-18064-508/root/chroot_tmpdir/scmroot/mate-menu
Cloning into '/var/lib/mock/f45-build-18064-508/root/chroot_tmpdir/scmroot/mate-menu'...
$ git fetch origin 84ea202db87c679e003fe5d8f2be60bd5915e68c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mate-menu
 * [new ref]         84ea202db87c679e003fe5d8f2be60bd5915e68c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84ea202 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild