code: def check_existens_of_staging_tag_in_remote_repo():
          
          staging_tag = Git.create_git_version_tag(APISettings.GIT_STAGING_PRE_TAG)
  
          command_git = 'git ls-remote -t'
          command_awk = 'awk \'{print $2}\''
          command_cut_1 = 'cut -d \'/\' -f 3'
          command_cut_2 = 'cut -d \'^\' -f 1'
          command_sort = 'sort -b -t . -k 1,1nr -k 2,2nr -k 3,3r -k 4,4r -k 5,5r'
          command_uniq = 'uniq'
  
          command = command_git + ' | ' + command_awk + ' | ' + command_cut_1 + ' | ' + \
                    command_cut_2 + ' | ' + command_sort + ' | ' + command_uniq
  
          list_of_tags = str(check_output(command, shell=True))
  
          if staging_tag in list_of_tags:
              return True
          return False
docs: This method will check, if the given tag exists as a staging tag in the remote repository.
  
          The intention is, that every tag, which should be deployed on a production envirnment,
          has to be deployed on a staging environment before.