$ git clone -n https://github.com/xcp-ng-rpms/ocaml /var/lib/mock/v9.0-u-ydi1-11182-29582/root/chroot_tmpdir/scmroot/ocaml
Cloning into '/var/lib/mock/v9.0-u-ydi1-11182-29582/root/chroot_tmpdir/scmroot/ocaml'...
$ git fetch origin a01b11e38c60400428f0392a2f1b2275eef5eb98:KOJI_FETCH_HEAD
From https://github.com/xcp-ng-rpms/ocaml
 * [new ref]         a01b11e38c60400428f0392a2f1b2275eef5eb98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a01b11e bump release for test build