$ git clone -n https://src.fedoraproject.org/rpms/lxpanel.git /var/lib/mock/f45-build-17820-504/root/chroot_tmpdir/scmroot/lxpanel
Cloning into '/var/lib/mock/f45-build-17820-504/root/chroot_tmpdir/scmroot/lxpanel'...
$ git fetch origin 2de6af218ea07980c5563031543a02f10c12c8a0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxpanel
 * [new ref]         2de6af218ea07980c5563031543a02f10c12c8a0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2de6af2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild