Comment 8 for bug 1593583

It works for me with those PPAs.

(yakkety-amd64)root@nightingale:/build# apt update
Hit:1 http://ppa.launchpad.net/ricotz/unstable/ubuntu yakkety InRelease
Hit:2 http://security.ubuntu.com/ubuntu yakkety-security InRelease
Get:3 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu xenial InRelease [17.6 kB]
Get:4 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu xenial/main amd64 Packages [2008 B]
Hit:5 https://swift.canonistack.canonical.com/v1/AUTH_e8074875467b46b7ab3c41ac60ccfbe7/yakkety yakkety InRelease
Get:6 http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu xenial/main Translation-en [966 B]
Hit:7 http://archive.ubuntu.com/ubuntu yakkety InRelease
Get:8 http://archive.ubuntu.com/ubuntu yakkety-updates InRelease [92.2 kB]
Hit:9 http://archive.ubuntu.com/ubuntu yakkety-proposed InRelease
Fetched 113 kB in 0s (191 kB/s)
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
(yakkety-amd64)root@nightingale:/build#
laney@nightingale> GET http://ppa.launchpad.net/ricotz/unstable/ubuntu/dists/yakkety/InRelease | grep Date
Date: Fri, 17 Jun 2016 7:35:25 UTC
laney@nightingale> GET http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu/dists/xenial/InRelease | grep Date
Date: Wed, 30 Mar 2016 2:27:15 UTC