Are there test:recent, test:uncommitted task alternative for RSpec

By default Rails provides these task to test_unit tests:

rake -T
rake test:recent # Run tests for
recenttest:prepare / Test recent changes
rake test:uncommitted # Run tests for
uncommittedtest:prepare / Test changes since last checkin (only
Subversion and Git)

I wonder if somebody has readymade spec:recent and spec:uncommitted to
share.

Sincerely,
Evgeniy