code: def get_commit_id_from_cmd() -> Optional[str]:
      """
      Returns the output of 'git rev-parse HEAD'
      :return: A commit id, or None if the command fails
      """
      try:
          logger.debug('Executing "git rev-parse HEAD"')
          commit_id = (
              check_output("git rev-parse HEAD".split(" "))
              .decode("UTF-8")
              .strip()
          )
          logger.debug("Found commit id: {}".format(commit_id))
          return commit_id
      except CalledProcessError as e:
          logger.debug("Error getting commit id:")
          logger.debug(format(e))
          return None
  
imports: import argparse
  import ctypes
  import glob
  import logging
  import os
  import re
  import sys
  from itertools import chain
  from subprocess import CalledProcessError, check_output
  from typing import Dict, List, Optional
  import boto3
  import botocore.exceptions
  import yaml
label_desc: Use image node_id 5 for calling a global function with example usage: get_commit_id_from_cmd() and returns: commit_id, None