tmp fix with fallback

Author: x3c41a

examples/justfile

@@ -43,11 +43,22 @@ setup-westend-prerequisites:
 
     cd $POLKADOT_SDK_DIR
 
-    # Check out the required branch
-    echo "   Checking out branch bko-bulletin-para-support..."
+    # Check out the required branch or commit
+    echo "   Fetching latest changes from polkadot-sdk..."
     git fetch origin
-    # TODO: later, before merging, switch to the `bko-bulletin-support` https://github.com/paritytech/polkadot-sdk/pull/10662 (not now)
-    git reset --hard origin/bko-bulletin-para-support
+    
+    # Try to check out the branch, fall back to commit hash if branch doesn't exist
+    BRANCH_NAME="bko-bulletin-para-support"
+    FALLBACK_COMMIT="b2bcb74b13f1a1e082f701e3e05ce1be44d16790"  # From Cargo.toml
+    
+    if git ls-remote --heads origin "$BRANCH_NAME" | grep -q "$BRANCH_NAME"; then
+        echo "   Checking out branch $BRANCH_NAME..."
+        git reset --hard origin/$BRANCH_NAME
+    else
+        echo "   ⚠ Branch $BRANCH_NAME not found, using commit $FALLBACK_COMMIT instead..."
+        echo "   TODO: later, before merging, switch to the \`bko-bulletin-support\` https://github.com/paritytech/polkadot-sdk/pull/10662 (not now)"
+        git reset --hard $FALLBACK_COMMIT
+    fi
 
     # Build polkadot binary
     echo "   Building polkadot binary (this may take a while)..."