Add repo.clean

[tomek-he-him]

Hi, I’d love to be able to clean a part of the repo. For example:

repo.clean(
  'test/mock-cwd',
  {force: true},
  (error) => {…}
);

[notatestuser]

Could you send a PR?

[tomek-he-him]

Hi, thanks for the response. I actually moved to a simpler solution for the initial problem – without git. So I’m not using gift after all.

Feel free to close this issue if you don’t think it may be useful for others.