android 6.0 running on BBB

hi everyone

im trying to make a build a android 6.0 to BBB
but when i get kernel , it has git problem , actually im lacking in git so i dont know what i have to check

it is my situation

i want build and booting refer to this guide
https://docs.google.com/viewer?a=v&pid=forums&srcid=MTczNzY5MjQ0Njg2MjQ5NDgzODcBMTY2Mzc1OTI0NTUyMjYzMDU0NzQBODJhQXVnSF9EQUFKATAuMQEBdjI

please help and share a tip

Thanks