Bug: Pull Request Creation tests Not working

[noorbuchi]

Describe the bug
When trying to manually create a pull request in the test repository, an error message shows that:

Pull request creation failed. Validation failed: cannot have more than 100 pull requests with the same head_sha.

This is causing two test cases that ensure pull request creation is working.

To Reproduce
Steps to reproduce the behavior:

1. locally run potery run task test-verbose
2. OR manually create a pull request in the test repository AC-GopherBot/test-1

Expected behavior
The tests are expected to pass.

[noorbuchi]

This issue is also associated with the current failing tests caused by the test repository.

Update: the tests are now passing after resetting the test repository. It's expected that this issue will arise after 100 pull requests are created in the new test repo.