$ pip install repograph

$ repograph --help
Usage: repograph [OPTIONS]

  Draw a graph of GitHub submodule relationships.

  Specify roots of the repository graph with `-r <repo>` or `-o <org>`.

  Both -r and -o may be passed multiple times.

Options:
  --strip-org / --no-strip-org  Strip organization from node labels?
  -l, --layout-program TEXT     Program to use for rendering.  [default: dot]
  -o, --output TEXT             Output Path  [default: repograph.png]
  -g, --org TEXT                GitHub Organization to include
  -r, --repo TEXT               Repository to include
  -t, --token TEXT              GitHub Access Token
  --help                        Show this message and exit.

  Examples:

  # Alternatively, you can pass the token via -t.
  $ export GITHUB_API_TOKEN=<token>

  # Draw a graph rooted at a single repo.
  $ repograph -r <repo>

  # Draw a graph rooted with all the repos in an org.
  $ repograph -o <org>