How do I get an older version of Ardupilot?

ArduCopter Copter 3.6
1

I’m trying to get the ardupilot source using git clone https://github.com/ArduPilot/ardupilot.git --recursive --branch Copter-3.6.0 but I’m getting I get the following error:

fatal: Unable to clone ‘git://github.com/ArduPilot/ChibiOS.git’ to submodule path ‘/home/lqs66/desktop/ardupilot/modules/ChibiOS’ Cloning ‘modules/ChibiOS’ failed. Retry as planned

2

Do you need to build it?
There’s previous builds here:
https://firmware.ardupilot.org/Copter/
3.6.12 is the best version back in that era.

3

Thanks for the reply, I need to compile it myself.