$ git clone -n https://src.fedoraproject.org/rpms/ocaml-obuild.git /var/lib/mock/f45-build-20599-572/root/chroot_tmpdir/scmroot/ocaml-obuild
Cloning into '/var/lib/mock/f45-build-20599-572/root/chroot_tmpdir/scmroot/ocaml-obuild'...
$ git fetch origin df5ee3f666bedb2904c1b96d8d6dbfdebdb0bd41:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-obuild
 * [new ref]         df5ee3f666bedb2904c1b96d8d6dbfdebdb0bd41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at df5ee3f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild