You can clone with
HTTPS or Subversion.
It`s not possible to enter domain names with a german umlaut, e.g. tst.de
I couldn`t enter it in the field for mysql host (mysql5.tst.de) and for the – i think it was this field – piwik host folder.
(In 1010) – fixed #523 adding website with international characters doesn’t work; eg. t?\195?\164st.de