Comment 11 for bug 1439226

On 2015-04-01 16:33 (+0200), Lucian wrote:
> I've just realised that there's a trivial workaround - select the
> clone and then activate the square tool and the pattern handles will
> be displayed.

Same with groups - see related report
Bug #686245 “Make pattern assigned to group editable with the node tool”
https://bugs.launchpad.net/inkscape/+bug/686245