$ git clone -n https://src.fedoraproject.org/rpms/libguestfs.git /var/lib/mock/f31-build-111630-34187/root/chroot_tmpdir/scmroot/libguestfs
Cloning into '/var/lib/mock/f31-build-111630-34187/root/chroot_tmpdir/scmroot/libguestfs'...
$ git reset --hard d8b20c846c353f11e184d0c42465a0a75869afcf
HEAD is now at d8b20c8 OCaml 4.08.1 (rc2) rebuild.