According to the pygit2 changelog for v1.15.0, the attribute oid no longer exists for Commit objects. It instead recommends using the id attribute.

What does this affect?

Currently, our production code is unaffected. However, 1 of our unit tests used Commit.oid to detach the head of a checked out repo:

So, I'm not concerned with the current release used by cpp-linter-action. ☺️