$ git clone -n https://src.fedoraproject.org/rpms/erlang-mqtree.git /var/lib/mock/f45-build-8380-386/root/chroot_tmpdir/scmroot/erlang-mqtree
Cloning into '/var/lib/mock/f45-build-8380-386/root/chroot_tmpdir/scmroot/erlang-mqtree'...
$ git fetch origin 84287d28442f09f5dfd15ea4cd4b708c5e98a2e5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-mqtree
 * [new ref]         84287d28442f09f5dfd15ea4cd4b708c5e98a2e5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 84287d2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild