$ git clone -n https://github.com/xcp-ng-rpms/ocaml-findlib /var/lib/mock/v9.0-u-ydi1-11053-29488/root/chroot_tmpdir/scmroot/ocaml-findlib
Cloning into '/var/lib/mock/v9.0-u-ydi1-11053-29488/root/chroot_tmpdir/scmroot/ocaml-findlib'...
$ git fetch origin cf553203fe49c378fe69e232dce861e7eda0e3f9:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/ocaml-findlib
 * [new ref]         cf553203fe49c378fe69e232dce861e7eda0e3f9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cf55320 bump release for test build