ci: checkout complete repository to generate meaningful version header

output its content before listing build directory as well

.github/workflows/build-cmake.yml

@@ -32,6 +32,8 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
 
       - name: Install Dependencies
         shell: bash
@@ -61,5 +63,6 @@ jobs:
         if: always()
         shell: bash
         run: |
+          cat build/expversion.h
           git status
           ls -lR build