add message if doing nothing

update-gluon.sh

@@ -21,6 +21,7 @@ git fetch upstream --tags
 
 # we already have this branch - exit
 if ! git rev-parse --verify "$fork_newest_minor_branch" &> /dev/null; then
+    echo "Nothing todo, branch $fork_newest_minor_branch already exists"
     exit 1
 fi