You cannot. At least not easily.
Packages are only available for Factory/Tumbleweed, and even those still have problems so it will take a while until GNOME 3.16 officially appears in Tumbleweed.
For your 13.1 there never will be official packages though.
You could try to download the source and compile it yourself, or branch the packages from GNOME:Factory on OBS and build them for 13.1.
But most likely you’d have to upgrade a lot of other packages as well.
If you want to always use the latest and greatest, you should probably consider switching to Tumbleweed.