$ git clone -n https://src.fedoraproject.org/rpms/ocaml-biniou.git /var/lib/mock/f45-build-20464-570/root/chroot_tmpdir/scmroot/ocaml-biniou
Cloning into '/var/lib/mock/f45-build-20464-570/root/chroot_tmpdir/scmroot/ocaml-biniou'...
$ git fetch origin c0009b185289c52b2b99f0186be269cce4df44dc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-biniou
 * [new ref]         c0009b185289c52b2b99f0186be269cce4df44dc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c0009b1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild