It seems that Libre Office shipped with 11.4 has KDE3 support disabled. This is a big problem for all KDE3 users. To enable the KDE3 support I have to clone the entire LibreOffice project.
Is there an easy way to do so?
You found the project/package.
Than just
Action → Branch Package
…and after that project/package will be move in your home directory.
It is possible to branch only a package, not project…
Yes, different name 
This command creates an empty project. One have then branch all necessary packages manually
Hi
You add the --checkout (co) option on the project and it will pull them all in.
Oh. Thank you.
You can link entire projects (basically the sources) and trigger the needed builds via localdep parameter: