git fsck exit code?

It looks like git fsck exits with 0 status even if there are some
errors. The only case where there's a non-zero exit code is if
verify_pack reports errors -- but not e.g. fsck_object_dir.

Is that really the intended behavior?  I think it would be nice to at
least support --exit-code (but probably a sensible exit code ought to be
the default).