$ git clone -n https://src.fedoraproject.org/rpms/ocaml-camlimages.git /var/lib/mock/f40-build-768417-125306/root/chroot_tmpdir/scmroot/ocaml-camlimages
Cloning into '/var/lib/mock/f40-build-768417-125306/root/chroot_tmpdir/scmroot/ocaml-camlimages'...
$ git fetch origin edc7dcdf732cb093c49e0a261e1da039862aa6a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-camlimages
 * [new ref]         edc7dcdf732cb093c49e0a261e1da039862aa6a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at edc7dcd Bump release and rebuild