Describe the feature or problem you’d like to solve

I want to create a fork and then clone it locally shallowly. This is not possible since gh repo fork --clone does not provide any options and does not return the repo name in a clean way.

Proposed solution

gh repo clone -- --depth 1 --single-branch $(gh repo fork --clone=false)

or accept gitflags like gh repo clone does

gh repo fork --clone -- --depth 1 --single-branch

How will it benefit CLI and its users?

This speeds up the cloning progress. Adding support for gitflags will also align repo fork with repo clone