Describe `Submodule.__init__` parent_commit parameter by EliahKagan · Pull Request #1877 · gitpython-developers/GitPython
:param parent_commit: See :meth:`set_parent_commit`. The :class:`~git.objects.commit.Commit` whose tree is supposed to contain the ``.gitmodules`` blob, or ``None`` to always point to the most recent commit. See :meth:`set_parent_commit` for details.
:param url: The URL to the remote repository which is the submodule.
:param commit: Commit-ish reference pointing at the root_tree, or ``None`` to always point Commit-ish reference pointing at the root tree, or ``None`` to always point to the most recent commit.
:param check: