Вы уже делаете его правильно, 1227643821 просто не 12.02.2008, это действительно 25.11.2008.
If you are using bash there is almost certainly a bash-completion script you could use. A quick search reveals an extremely promising script hosted in the offical Subversion repository: ../tools/client-side/bash_completion.
I may well use this myself!
Try tortoisesvn. It helps you do all this from the explorer (Assuming you're on windows).