def METHOD_NAME(self, repo: CkanRepo) -> Commit:
    print(f'Fetching {self.pull_request.head.repo.clone_url} {self.pull_request.head.ref}...')
    repo.git.fetch(self.pull_request.head.repo.clone_url, self.pull_request.head.ref)
    return repo.commit(self.pull_request.head.sha)