Failed to make sitl (software in the loop) on Windows

Hi Fellows,

I am following the instructions on http://ardupilot.org/dev/docs/sitl-native-on-windows.html#sitl-native-on-windows to set up the SITL on the Windows and I ran into the problems, firstly, 

git clone git://github.com/ArduPilot/ardupilot.git 

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