A new database can be synchronize, just add this entry on your pacman.conf

$ [obarun_testing]
SigLevel = PackageRequired
Server = http://www.obarun.org/src/$arch/testing

This repository was made for testing packages before push it on principal database. Do not forget to take a look on https://github.com/Obarun/obarun-pkgbuild-testing.
Well, this repository must not be use for stable system as same as official archlinux testing repo.