I am going step by step your 3.2.2 Setting up a new block tutorial (mutliply_py_ff block) and i get this error:
"" gr_modtool add -t sync -l python
GNU Radio module name identified: tutorial
Language: Python
Enter name of block/code (without module name prefix): mutliply_py_ff
Block/code identifier: mutliply_py_ff
/bin/sh: 1: git: not found
Please specify the copyright holder: "