Repo fork ignores the `--remote` flag when specifying a repository via argument

Describe the bug

When I try to fork a repo and add a new remote, it doesn't add a new remote to my current repository.

gh version 1.4.0 (2020-12-17)

Expected vs actual behavior

I expect to see a fork remote added to my repository, but nothing is added.

Logs

gh repo fork --clone=false --remote=true $(git remote get-url up)
- Forking someorg/somerepo...
✓ Created fork gib/somerepogit remote
upgh --version
gh version 1.4.0 (2020-12-17)
https://github.com/cli/cli/releases/latest