simple gitman install

    sudo apt install -y git python3-pip python3-venv build-essential libffi-dev
    python3 -m venv ~/envs/gitman
    . envs/gitman/bin/activate
    pip3 install --upgrade pip
    pip3 install wheel
    pip3 install git_manage
    gitman clone -r <https://github.com/path/to/your/repository.git>