REF add a useful note justifying the existence of this script

run_once_clone-repos.sh

@@ -1,5 +1,11 @@
 #! /bin/bash
 
+## This script pulls all my git repos that I use in my config. It will only pull
+## them if they don't exist. Rather than use the import approach suggested in
+## the chezmoi howto, this doesn't require me to keep 'syncing' changes when I
+## work in these repos directly. The tradeoff is that it will only pull the
+## latest master, which is totally fine with me.
+
 clone_maybe () {
     if [ ! -d "$2" ]; then
         echo cloning git repo: "$1"