When hacking on AGX, you have to deal with a large number of repositories in the local agx.dev checkout directory.
The repositories are in a subfolder called devsrc/. To update them all the normal way would be quite a lot of typing and changing directories.
To ease this process, Robert has created a tool named githelper or igitt. You can check it out from rnixx’ githelper repository on Github and install it into your system.
Once you have done that, you can change directory to devsrc/ and update all repositories at once (git pull).
Find more documentation in igitt.py.