code: def fetch_git(repo, filename, branch="master", hash=None):
      
      url = git_url(repo, filename, branch, hash)
      response = requests.get(url)
  
      if response.status_code != 200:
          raise Exception('Got a bad status looking up gist.')
      body = response.text
      if not body:
          raise Exception('Unable to get the gist contents.')
  
      return body
docs: Fetch a gist and return the contents as a string.