Configure git to use IPv4 instead of IPv6 by default

The more generic solution (that also works for BSD) is to edit the global /etc/ssh/ssh_config or per-user ~/.ssh/config and add/replace the entry:

AddressFamily any 

with the following line (where inet corresponds to ipv4):

AddressFamily inet

You can also set this for just a single host:

Host example.com
    AddressFamily inet