I was wondering why a git fetch was taking 2+ minutes, then I discovered that common-lisp.net has an AAAA record configured, but that address doesn't work, it doesn't even respond to ICMPv6; and since I have an IPv6-native connection at home, and newer distros are configured to give priority to IPv6 addresses, ssh connections timeout until fallback to the IPv4 address. I suggest removing the record.