Revert "Update workflow, will that work?"

This reverts commit 54eed2a.

Author: charles-turner-1

.github/workflows/ci.yml

@@ -12,8 +12,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/[email protected]
-        with:
-          fetch-depth: 0
       - uses: actions/setup-python@v6
       - uses: pre-commit/[email protected]
 
@@ -27,20 +25,16 @@ jobs:
     - uses: prefix-dev/[email protected]
       with:
         environments: ${{ matrix.environment }}
-        # frozen: true # This seems hacky?
+        frozen: true # This seems hacky?
 
-    - name: Clean workspace
+    - name: Clean git workspace
       run: |
         git clean -fdx
         git reset --hard HEAD
 
-    - name: Update lockfile
-      run: |
-        pixi lock 
-
     - name: Run tests and generate coverage report
       run: |
-        pixi run -e ${{ matrix.environment }} test-cov
+        pixi clean && pixi run -e ${{ matrix.environment }} test-cov
 
     - name: Upload code coverage
       uses: codecov/codecov-action@v5