$ git clone -n https://src.fedoraproject.org/rpms/ocaml-ppx-deriving-yojson.git /var/lib/mock/f37-build-644418-72220/root/chroot_tmpdir/scmroot/ocaml-ppx-deriving-yojson
Cloning into '/var/lib/mock/f37-build-644418-72220/root/chroot_tmpdir/scmroot/ocaml-ppx-deriving-yojson'...
$ git reset --hard a2df1fabf058b56531016c2e9b657170829e2ab7
HEAD is now at a2df1fa Version 3.7.0.  Drop upstreamed -pext-decl patch.