Well, that file isn’t there anymore in that repo, it’s updated to fd0ssh-20130605-47.1.x86_64.rpm now.
So try to refresh your repos with “sudo zypper ref”.
If that doesn’t help, there’s some error in that repo’s metadata. I would suggest you to disable that repo ([noparse]http://jftp.inai.de/openSUSE_12.3/[/noparse]) temporarily then.