$ git clone -n https://src.fedoraproject.org/rpms/ocaml-sexplib.git /var/lib/mock/f40-build-2050290-49023/root/chroot_tmpdir/scmroot/ocaml-sexplib
Cloning into '/var/lib/mock/f40-build-2050290-49023/root/chroot_tmpdir/scmroot/ocaml-sexplib'...
$ git fetch origin 2d6d7a97f2c2818d16bfb6bb0746c880cf6c7d28:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-sexplib
 * [new ref]         2d6d7a97f2c2818d16bfb6bb0746c880cf6c7d28 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d6d7a9 Bump release and rebuild