we don't want to be reading branch information from the local git repository because it will likely not match the repository the user has explicitly selected

I would think a lot of use cases for -R/--repo would involve users trying to interact with an upstream or forked repository. In which case could we assume it might still be handy to see branch completions since forks usually have little branch discrepancy from upstream repositories?

I'm in my local git repository which has a base repo of bchadwic/cli. I'm about to open a pr:
$ gh pr create -R cli/cli -H bchadwic:autocomplete-branch-flags -B..."is default main or trunk?"

If you don't think this is a frequent scenario, do you possibly have a suggestion as to how to prevent autocompletion on scenario # 2?

_ = cmd.RegisterFlagCompletionFunc(name, func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
      if cmd.Flag("repo").Changed {
	      return []string{"AUTOCOMPLETE NOT ALLOWED WITH REPO FLAG"}, cobra.ShellCompDirectiveDefault
      }
      return options, cobra.ShellCompDirectiveNoFileComp
})

I tried this but I don't think the repo flag is set until the user runs the command. Would there be another approach you would take?

Thank you 🦖