Refs #21286: Add check to use different sources

signed-off-by: JesusPoderoso <jesuspoderoso@eprosima.com>

.github/workflows/codeql-analysis.yml

@@ -39,11 +39,19 @@ jobs:
         # Learn more:
         # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
 
+    env:
+      fastcdr-branch: ${{
+        github.event_name == 'workflow_dispatch' && github.event.inputs.fastcdr-branch ||
+        github.event_name == 'pull_request' && github.ref ||
+        github.event_name == 'schedule' && matrix.supported-branches ||
+        '2.2.x'
+      }}
+
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
       with:
-        ref: ${{ github.event.inputs.fastcdr-branch  || github.ref || matrix.supported-branches }}
+        ref: ${{ env.fastcdr-branch }}
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL