code: def run(self):
          
          if self.workflow.build_process_failed:
              self.log.info('Build failed, skipping koji tagging')
              return
  
          build_id = self.workflow.exit_results.get(KojiImportPlugin.key)
          if not build_id:
              build_id = self.workflow.exit_results.get(KojiPromotePlugin.key)
              if not build_id:
                  self.log.info('No koji build from %s or %s', KojiImportPlugin.key,
                                KojiPromotePlugin.key)
                  return
  
          session = get_koji_session(self.workflow, self.koji_fallback)
          build_tag = tag_koji_build(session, build_id, self.target,
                                     poll_interval=self.poll_interval)
  
          return build_tag
docs: Run the plugin.