$ git clone -n https://src.fedoraproject.org/rpms/ocaml-findlib.git /var/lib/mock/f45-build-20526-571/root/chroot_tmpdir/scmroot/ocaml-findlib
Cloning into '/var/lib/mock/f45-build-20526-571/root/chroot_tmpdir/scmroot/ocaml-findlib'...
$ git fetch origin 2299e39b68bf364c9b45458e759e13d0a6e9996d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-findlib
 * [new ref]         2299e39b68bf364c9b45458e759e13d0a6e9996d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2299e39 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild