build: use the correct base branch for xsscommitlint

It might not be master!

(cherry picked from commit fc894e1fd8977ac450118887a1914ca248e3571c)

.github/workflows/quality-checks.yml

@@ -24,7 +24,7 @@ jobs:
         fetch-depth: 2
 
     - name: Fetch master for comparison
-      run: git fetch --depth=1 origin master
+      run: git fetch --depth=1 origin ${{ github.base_ref }}
 
     - name: Install Required System Packages
       run: sudo apt-get update && sudo apt-get install libxmlsec1-dev
@@ -65,6 +65,7 @@ jobs:
         SCRIPT_TO_RUN: ./scripts/generic-ci-tests.sh
         SHARD: 4
         PIP_SRC_DIR: ${{ runner.temp }}
+        TARGET_BRANCH: ${{ github.base_ref }}
       run: |
         ./scripts/all-tests.sh
 

scripts/xss-commit-linter.sh

@@ -34,6 +34,7 @@ show_verbose() {
     echo "Files linted is based on the following:"
     echo "- Current commit: ${current_branch_hash}"
     echo "- Main commit: ${MAIN_COMMIT}"
+    echo "- Target branch: ${TARGET_BRANCH}"
     echo "- Merge base command: ${merge_base_command}"
     echo "- Merge base: ${merge_base}"
     echo "- Diff command: ${diff_command}"