git clone https://github.com/pribot/rbx1.git

edit

I read about the book ros_by_example_indigo_volume_1 , first time i tap

git clone https://github.com/pribot/rbx1.git

it print

Username for 'https://github.com'

im sure it not talking about 'my own' username.

second i tap

git clone --depth=1 https://github.com/pirobot/rbx1.git

it worked , but when i tap

git checkout indigo-devel

it print:

error: pathspec 'indigo-devel' did not match any file(s) known to git.

I download the zip form web page and unzip it to my ~/catkin_ws/src and try to catkin_make, nothing happen. how can i do next?