[Paparazzi-devel] How could I clean the local source code entirely for my next downloading of the code?

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Hi,all!

    I wanna redownload the entire source code from repository because I wanna return the code to the original since I have edited it.

    I have tried to delete the whole paparazzi folder to make the environment "clean".So that I can redo the command "$ git clone https://github.com/paparazzi/paparazzi.git". But even after that I still get the return:"fatal:the destination 'paparazzi' has already exit,and it is not an empty directory".

    What should I do to clean the local source code entirely for my next downloading of the code?

    Thank's a lot!!