[BUG] Checkout user/repo will try and fork every time

[FollowTheProcess]

Describe the bug

When calling pytoil checkout user/repo it tries to fork every time rather than checking if you have already forked that particular repo.

This is an oversight on my end when writing the fork functionality.

To Reproduce

# Where user/repo is a fork you have already forked
pytoil checkout user/repo

Expected behavior

Should warn that the fork already exists and exit.

Screenshots

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Environment

pytoil --version

Additional context

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