$ git clone -n https://src.fedoraproject.org/rpms/ocaml-odoc.git /var/lib/mock/f41-build-839896-160412/root/chroot_tmpdir/scmroot/ocaml-odoc
Cloning into '/var/lib/mock/f41-build-839896-160412/root/chroot_tmpdir/scmroot/ocaml-odoc'...
$ git fetch origin 6e684588fcc9f779f68d2c2c16caa3e0057e14a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-odoc
 * [new ref]         6e684588fcc9f779f68d2c2c16caa3e0057e14a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e68458 Rebuild for ocaml-yojson 2.2.2