$ git clone -n https://github.com/xcp-ng-rpms/ocaml-findlib /var/lib/mock/v9.0-u-ydi1-11054-29488/root/chroot_tmpdir/scmroot/ocaml-findlib
Cloning into '/var/lib/mock/v9.0-u-ydi1-11054-29488/root/chroot_tmpdir/scmroot/ocaml-findlib'...
$ git fetch origin 2524c69dd9c9ec9a90689bf4fd13e3f5f7d6c397:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/ocaml-findlib
 * [new ref]         2524c69dd9c9ec9a90689bf4fd13e3f5f7d6c397 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2524c69 bump release for test build