Merge pull request #51751 from margelo/fix/e2e-builds

[NoQA] fix: fetch main only if we are not on main

.github/workflows/e2ePerformanceTests.yml

@@ -32,9 +32,6 @@ jobs:
         with:
           fetch-depth: 0  # Fetches the entire history
 
-      - name: Fetch main branch
-        run: git fetch origin main:main
-
       - name: Determine "baseline ref" (prev merge commit)
         id: getBaselineRef
         run: |
@@ -46,6 +43,7 @@ jobs:
             previous_merge=$(git rev-list --merges HEAD~1 | head -n 1)
           else
             # On a feature branch, find the common ancestor of the current branch and main
+            git fetch origin main:main
             previous_merge=$(git merge-base HEAD main)
           fi
           echo "$previous_merge"