$ git clone -n https://src.fedoraproject.org/rpms/ocaml-cpdf.git /var/lib/mock/f45-build-20502-571/root/chroot_tmpdir/scmroot/ocaml-cpdf
Cloning into '/var/lib/mock/f45-build-20502-571/root/chroot_tmpdir/scmroot/ocaml-cpdf'...
$ git fetch origin aebaba78069a80e74a8595ac1da5a4bbf93bc158:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-cpdf
 * [new ref]         aebaba78069a80e74a8595ac1da5a4bbf93bc158 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aebaba7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild