Building Zimbra on an IBM power VM

[talile]

Please help I am trying to build zimbra from source for Centos7 installed on IBM power virtual machine, following https://wiki.zimbra.com/wiki/Building_Zimbra_using_Git. But its says:
git clone git@zimbra-git1:zm-zcs
Cloning into 'zm-zcs'...
ssh: connect to host git.zimbra.com port 1067: Connection timed out
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.