$ git clone -n https://src.fedoraproject.org/rpms/ocaml-store.git /var/lib/mock/f45-build-20749-573/root/chroot_tmpdir/scmroot/ocaml-store
Cloning into '/var/lib/mock/f45-build-20749-573/root/chroot_tmpdir/scmroot/ocaml-store'...
$ git fetch origin fbcb761ea2bb031cdbdffe4218e5fe651dc8a901:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-store
 * [new ref]         fbcb761ea2bb031cdbdffe4218e5fe651dc8a901 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fbcb761 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild