Fix release package script (#131)

release/package/run.sh

@@ -47,8 +47,14 @@ make_package () {
     echo "Building Memgraph $offering for $os on $build_container..."
 
     echo "Copying project files..."
+    # If master is not the current branch, fetch it, because the get_version
+    # script depends on it. If we are on master, the fetch command is going to
+    # fail so that's why there is the explicit check.
     # Required here because Docker build container can't access remote.
-    cd "$PROJECT_ROOT" && git fetch origin master:master
+    cd "$PROJECT_ROOT"
+    if [[ "$(git rev-parse --abbrev-ref HEAD)" != "master" ]]; then
+        git fetch origin master:master
+    fi
     docker exec "$build_container" mkdir -p /memgraph
     docker cp "$PROJECT_ROOT/." "$build_container:/memgraph/"