Installing oemof_visio under windows

The installation with: “pip install git+https://github.com/oemof/oemof_visio.git” did not work. Do I have to write anything different?
I get the following error:
Error [WinError 2] Das System kann die angegebene Datei nicht finden while executing command git clone -q https://github.com/oemof/oemof_visio.git C:\Users\nagel\AppData\Local\Temp\pip-rkdz0ake-build
Cannot find command ‘git’

The program git has to be installed. See https://git-scm.com/ for example.