Not able to clone!

git clone https://github.com/XDDCoin/XDD-master/tree/master/XDDCoin-master
Cloning into 'XDDCoin-master'...
fatal: repository 'https://github.com/XDDCoin/XDD-master/tree/master/XDDCoin-master/' not found

Also the zip version gives me this error:
make: warning:  Clock skew detected.  Your build may be incomplete.