code: def __git_commit(git_tag):
          
          Shell.msg('Commit changes.')
          if APISettings.DEBUG:
              Shell.debug('Execute "git commit" in dry mode.')
              if not call(['git', 'commit', '-m', '\'' + git_tag + '\'', '--dry-run']):
                  pass
              return True
  
          if not call(['git', 'commit', '-m', '\'' + git_tag + '\'']):
              return True
          return False
docs: Commit files to branch.
          The function call will return 0 if the command success.