$ git clone -n https://src.fedoraproject.org/rpms/ocaml-unionfind.git /var/lib/mock/f45-build-20755-573/root/chroot_tmpdir/scmroot/ocaml-unionfind
Cloning into '/var/lib/mock/f45-build-20755-573/root/chroot_tmpdir/scmroot/ocaml-unionfind'...
$ git fetch origin 9527534c4c7e807bf3693ab2fc3b5237579c2540:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-unionfind
 * [new ref]         9527534c4c7e807bf3693ab2fc3b5237579c2540 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9527534 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild