$ git clone -n https://src.fedoraproject.org/rpms/ocaml-yojson.git /var/lib/mock/f31-build-64628-29590/root/chroot_tmpdir/scmroot/ocaml-yojson
Cloning into '/var/lib/mock/f31-build-64628-29590/root/chroot_tmpdir/scmroot/ocaml-yojson'...
$ git reset --hard 91840f15673addb076922e991a3e666f514c157e
HEAD is now at 91840f1 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild