$ git clone -n https://github.com/xcp-ng-rpms/ocaml-findlib.git /var/lib/mock/v8.3-incoming-9781-28496/root/chroot_tmpdir/scmroot/ocaml-findlib
Cloning into '/var/lib/mock/v8.3-incoming-9781-28496/root/chroot_tmpdir/scmroot/ocaml-findlib'...
$ git fetch origin 1c846c4992024b80e29319534919133e00c6ed39:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/ocaml-findlib
 * [new ref]         1c846c4992024b80e29319534919133e00c6ed39 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c846c4 Import ocaml-findlib-1.9.8-1.xs8.src.rpm (#2)