docs: def config_get(self, param, default=None):
          '''Return the value of a git configuration option.  This will
          return the value of the default parameter (which defaults to
          None) if the given option does not exist.'''
  
          try:
              return self("config", "--get", param,
                          log_fail=False, log_cmd=False)
          except exception.CommandFailed:
              return default