bug: multiple remote setup for reviewing pull requests #58

What happened?

I tried to review an open-source project pull request, however, it doesn't manage to recognize the pull requests.

The GitHub workflow, usually suggests to maintain your own fork as origin and have an upstream where you would have actual PRs open against.

origin  git@github.com:kakkoyun/opentelemetry-go-compile-instrumentation.git (fetch) [blob:none]
origin  git@github.com:kakkoyun/opentelemetry-go-compile-instrumentation.git (push)
upstream        git@github.com:open-telemetry/opentelemetry-go-compile-instrumentation.git (fetch)
upstream        git@github.com:open-telemetry/opentelemetry-go-compile-instrumentation.git (push)

In this setup, Diffity would NOT recognizes or refreshes pull requests.

Steps to reproduce

1. Open a project
2. Make sure it has multiple remote setups
3. Try to review a PR in a remote where it's not named origin

What did you expect to happen?

I would have expected it to recognize this pattern and list all the open PRs from different remotes. Or we need to have a settings to check target remote to pull the pull requets.

Diffity version

0.15.0

macOS version

26.7.1

Chip

Apple M4 Max

Logs or screenshots