$ git clone -n https://src.fedoraproject.org/rpms/ocaml-lablgl.git /var/lib/mock/f42-build-3402224-45132/root/chroot_tmpdir/scmroot/ocaml-lablgl
Cloning into '/var/lib/mock/f42-build-3402224-45132/root/chroot_tmpdir/scmroot/ocaml-lablgl'...
$ git fetch origin 7fb3c75b81bc6cd7164dfa8a82161ab82da82854:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-lablgl
 * [new ref]         7fb3c75b81bc6cd7164dfa8a82161ab82da82854 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7fb3c75 Fix for Tcl/Tk 9.0 (RHBZ#2343941)