You can clone with
HTTPS or Subversion.
This is not a problem, it's a new functionallity.
I think if whe can do the same with field in inline forms, filtered by field in parent form.
When field parent change, sons fields could be inizialized and filtered again.
Sorry but, how do you use this feature ?
I'd love to use this but how do you link to a parent's ForeignKey field ?