don't pull on detached head

installer/install.sh

@@ -77,7 +77,7 @@ pushd $my_tmp/opt/$my_name/lib/node_modules/$my_name/packages/assets
   pushd oauth3.org
     git remote set-url origin ${OAUTH3_GIT_URL}
     git checkout $my_azp_oauth3_ver
-    git pull
+    #git pull
   popd
 
   mkdir -p jquery.com