$ git clone -n https://src.fedoraproject.org/rpms/ocaml-sedlex.git /var/lib/mock/f42-build-3426277-45168/root/chroot_tmpdir/scmroot/ocaml-sedlex
Cloning into '/var/lib/mock/f42-build-3426277-45168/root/chroot_tmpdir/scmroot/ocaml-sedlex'...
$ git fetch origin 6a8fc634ec2bd35245c3fa3a3ef150355c6847c9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ocaml-sedlex
 * [new ref]         6a8fc634ec2bd35245c3fa3a3ef150355c6847c9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a8fc63 Rebuild for ocaml-ppxlib 0.35.0