Hm:
$ git clone git://gitorious.org/openembedded-core-layers/meta-kde4.git
Cloning into 'meta-kde4'...
fatal: Could not read from remote repository.
Might it something to do with:
System notice: Gitorious is being acquired by GitLab and gitorious.org will shut down end of May. Please import your repositories to GitLab.com
Ahh, this works:
$ git clone https://gitorious.org/openembedded-core-layers/meta-kde4.git