There is no need to have pacman force a refresh of all package lists.

https://wiki.archlinux.org/index.php/Pacman#Upgrading_packages

pages/linux/pacman.md

@@ -4,7 +4,7 @@
 
 - synchronize and update all packages
 
-`pacman -Syyu`
+`pacman -Syu`
 
 - install a new package