def BuildCommitPosition(branch, value):
  """Returns: A constructed commit position.

  An example commit position for branch 'refs/heads/master' value '12345' is:
  refs/heads/master@{#12345}

  This value can be parsed via 'ParseCommitPosition'.

  Args:
    branch: (str) The name of the commit position branch
    value: (int): The commit position number.
  """
  return '%s@{#%s}' % (branch, value)