code: def replace_git_url(generator):
      
      template = g_jinja2.get_template(GIT_TEMPLATE)
  
      should_cache = generator.context.get('GIT_CACHE_ENABLED')
      cache_location = generator.context.get('GIT_CACHE_LOCATION')
  
      for article in generator.articles:
          for match in git_regex.findall(article._content):
              params = collections.defaultdict(str)
              repo = match[1]
              filename = match[3]
              branch = match[5]
              hash = match[7]
  
              params['repo'] = match[1]
              params['filename'] = match[3]
              if match[5]:
                  params['branch'] = match[5]
              if match[7]:
                  params['hash'] = match[7]
  
              logger.info('[git]: Found repo {}, filename {}, branch {} and hash {}'.format(repo, filename, branch, hash))
              logger.info('[git]: {}'.format(params))
  
              body = None if not should_cache else get_cache(cache_location, **params)
  
              # Fetch the git
              if not body:
                  logger.info('[git]: Git did not exist in cache, fetching...')
                  response = fetch_git(**params)
                  body = get_body(response)
  
                  if should_cache:
                      logger.info('[git]: Saving git to cache...')
                      cache_params = copy.copy(params)
                      cache_params['body'] = body
                      set_cache(cache_location, **cache_params)
              else:
                  logger.info('[git]: Found git in cache.')
  
              # Create a context to render with
              context = generator.context.copy()
              context.update({
                  'code': body,
                  'footer': 'full',
                  'base': __url__,
                  'filename': filename,
                  'url': git_url(**params)
              })
              replacement = template.render(context)
              article._content = article._content.replace(match[0], replacement)
docs: Replace gist tags in the article content.