[op5-users] Error git

[Pier]

Since few days, i'm trying to get the updates of the ninja and merling from git, but i get always this error:

[root at nagios prova]# git clone git://git.op5.org/nagios/ninja.git
Initialized empty Git repository in /root/software/OP5/prova/ninja/.git/
fatal: unable to connect a socket (Connection refused)
fetch-pack from 'git://git.op5.org/nagios/ninja.git' failed.

Is it something changed?
Thanks

Pier