Describe the bug

any operation like gh pr merge -d that deletes a remote branch leaves a reference locally to the remote branch. This can be seen by doing git fetch --prune after and observing a line starting with - [deleted] (none) -> or by any of the operations from git that will show remote references. They will all show the remote branch as still existing an allow referencing it in any local git command before the git fetch --prune.

gh version 2.40.1 (2023-12-13)
https://github.com/cli/cli/releases/tag/v2.40.1

Steps to reproduce the behavior

1. Type this gh pr merge -d then git fetch --prune
2. View the output ' - [deleted] (none) -> '
3. See error

Expected vs actual behavior

Expected behavior is that git fetch --prune shows no changes

Logs

> gh pr merge -d -r 2853
✓ Rebased and merged pull request #2853 (Update fuzzing corpus.)
✓ Deleted local branch corpus-7284481772-merge
✓ Deleted remote branch corpus-7284481772-merge
> git fetch --all --prune --prune-tags --tags
From github.com:asakatida/chimera
 - [deleted]               (none)     -> origin/corpus-7284481772-merge