Fix Python – Easiest way to rename a model using Django/South?

I’ve been hunting for an answer to this on South’s site, Google, and SO, but couldn’t find a simple way to do this.
I want to rename a Django model using South.
Say you have the following:
class Foo(models.Model):
name = models.CharField()

class FooTwo(models.Model):
name = models.CharField()
foo = models.ForeignKey(Foo)

and you wan….