code: def execute(self):
          
          clean_cmd = ['git', 'clean', '-X', '-d']
          if 'CI' not in os.environ:
              LOGGER.info('The following files/directories will be deleted:')
              LOGGER.info('')
              LOGGER.info(check_output(clean_cmd + ['-n']).decode())
              if not strtobool(input('Proceed?: ')):
                  return False
          check_call(clean_cmd + ['-f'])
          empty_dirs = self.get_empty_dirs(self.env_root)
          if empty_dirs != []:
              LOGGER.info('Now removing empty directories:')
          for directory in empty_dirs:
              LOGGER.info("Removing %s/", directory)
              shutil.rmtree(os.path.join(self.env_root, directory))
          return True
docs: Execute git clean to remove untracked/build files.