[FFmpeg-user] When will ffmpeg use VP9 v1.5?

[D]

Hi,
I just downloaded the latest build (http://johnvansickle.com/ffmpeg/ -> 
"build: ffmpeg-git-64bit-static.tar.xz") and when encoding with VP9 (the 
new release has supposedly: "- Substantially improved VP9 encoding speed 
and quality"), it says:

...
[libvpx-vp9 @ 0x41f32e0] v1.4.0-1490-g0134764
...


I'm not sure but it looks like 0134764 (without the g at the beginning) 
is indeed rather old:
$ git clone https://chromium.googlesource.com/webm/libvpx
$ cd libvpx
$ git checkout v1.5.0
libvpx$ git show -s --format=%ci 0134764
2015-10-08 14:05:25 -0700

When will ffmpeg use VP9 v1.5?