code: def update_configs(self, release):
          
          git_repo = release['git_repo']
          git_cache = release['git_cache']
          if not os.path.isdir(git_cache):
              self.call(['git', 'clone', '--mirror', git_repo, git_cache])
          else:
              self.call(['git', 'fetch', '--all', '--prune'], cwd=git_cache)
          git_dir = release['git_dir'] = os.path.join(release['tmp_dir'],
                                                      os.path.basename(git_repo))
          self.call(['git', 'clone', '-b', release['git_branch'],
                     git_cache, git_dir])
  
          if release['delete_repo_files']:
              for repo_file in glob.glob(os.path.join(git_dir, '*.repo')):
                  self.log.info('Deleting %s' % repo_file)
                  os.unlink(repo_file)
docs: Update the fedora-atomic.git repositories for a given release