code: def task_id(self):
          
          if self['task_id']:
              return self['task_id']
          if self.extra and 'container_koji_task_id' in self.extra:
              return self.extra['container_koji_task_id']
docs: Hack to return a task ID for a build, including container CG builds.
  
          We have something for this in Brewweb, but not yet for upstream Koji:
          https://pagure.io/koji/issue/215