Describe the feature or problem you’d like to solve

I'd like to be able to specify the remote name to check out when I fork the current repo.

The current behaviour of defaulting to origin, and renaming an existing origin remote to upstream, doesn't really work when you need more than two remotes.

Proposed solution

gh repo fork --clone=false --remote=fork

# or:
gh repo fork --clone=false --remote=true --remote-name=fork

Additional context

Today I do this with:

hub fork --remote-name=fork

Ref. #2722 (comment)