CI: Fetch all commits

Shallow checkout might be causing issues with builds on CI

.github/workflows/tests.yml

@@ -13,6 +13,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
       with:
+        fetch-depth: 0
         submodules: "recursive"
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5