Uploaded coverage reports don't take into account original repo

[j-mie6]

Describe the bug The reports submitted to code climate for PRs made from forks and the master branch on the original repo itself have indistinguishable names.

Version of codeclimate-action you're using v2.7.5

Expected behavior When I have a PR made against my repo from a fork codeclimate's diff-coverage runs. To do that it requires a coverage report from both master on my repo, and the PR itself. However, when the PR comes from a forked repo, and that repo has made its PR from it's own master, the reports submitted override eachother:

Should instead be something like this:

The consequence is that codeclimate won't run the diff checking, because it is just seeing multiple test coverage reports submitted to master. I'm not sure exactly what's expected here: whether it should be master and minut1bc/master or something else.

Additional context I've raised an issue here just in case it is actually codeclimate's fault, but I suspect that the problem may be here instead, where the names are generated for submission.