[Contributing] Setting up a dev enviroment

I made a fork to help fixing some bugs but i stuck at the first step step: install it.
I got my fresh installed ubuntu vmware machine, my fork ( https://github.com/matteofabbri/mailinabox ) and my script ( http://biz.gennymobility.com/bootstrap.sh )

I didn’t make incredible changes: it was just a test so i changed 8.0 to 8.2 into the install script of owncloud and changed the source of the install script from https://github.com/mail-in-a-box/mailinabox to https://github.com/matteofabbri/mailinabox

Well, ready ? Go.
It doesn’t work.

Downloading Mailinabox 0.12c
fatal: not a git repository

if I try to switch mailinabox to mailinabox.git or to clone separatly and run setup.sh fails too