Problem installing picar-x module

[jreber2]

I tried to install the picar-x module based on instruction here: https://docs.sunfounder.com/projects/picar-x-v20/en/latest/python/python_start/install_all_modules.html
After command: git clone -b v2.0 https://github.com/sunfounder/picar-x.git I get error message:
fetch-pack: unexpected disconnect while reading sideband packet
fatal: early EOF
fatal: index-pack failed

How to solve the issue?