$ git clone -n https://src.fedoraproject.org/rpms/ocaml.git /var/lib/mock/f41-build-772717-13507/root/chroot_tmpdir/scmroot/ocaml
Cloning into '/var/lib/mock/f41-build-772717-13507/root/chroot_tmpdir/scmroot/ocaml'...
$ git fetch origin 7f5edb92c01292a25db532cf468fbc8894fdcd9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml
 * [new ref]         7f5edb92c01292a25db532cf468fbc8894fdcd9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7f5edb9 New upstream version 5.2.0 (RHBZ#2269805)