Teach git-pull-script about pulling tags

git-pull-script

@@ -4,10 +4,15 @@ merge_repo=$1
 
 merge_name=$(echo "$1" | sed 's:\.git/*$::')
 merge_head=HEAD
+type=head
+if [ "$2" = "tag" ]; then
+   type=tag
+   shift
+fi
 if [ "$2" ]
 then
-   merge_name="'$2' branch of $merge_name"
-   merge_head="refs/heads/$2"
+   merge_name="$type '$2' of $merge_name"
+   merge_head="refs/{$type}s/$2"
 fi
 
 : ${GIT_DIR=.git}