Checkout: Can this action be used to check out a non GitHub repository?

[r3econ]

I see the docs say I should provide repository name with owner.

- uses: actions/checkout@v2
  with:
    # Repository name with owner. For example, actions/checkout
    # Default: ${{ github.repository }}
    repository: ''

Is there a way to provide a repo URL there to check out a non GitHub account?

[f0rkz]

Not that I can find... I am trying to checkout a github enterprise URL and its not working at all. Getting a bit frustrated.