I can't clone the git repo on linux or on windows. I had to download a snapshot.

Ubuntu 14.04.4 LTS (a digital ocean VPS):
[efreak@cloud:~/source/gitweb/gnupg-b17577e] 128 % git clone
git://git.gnupg.org/gnupg.git
You know you have an alias for that, right? g clone
git://git.gnupg.org/gnupg.git
Cloning into 'gnupg'...
fatal: read error: Connection reset by peer
[efreak@cloud:~/source/gitweb/gnupg-b17577e] 128 %

Windows 10 x64 with git-scm (my home computer):
C:\Users\Efreak>git clone git://git.gnupg.org/gnupg.git
Cloning into 'gnupg'...
fatal: read error: Invalid argument