well yea, not as easy as just typing “git pull” in the command line 
but also not that hard (coming from this dum-dum). apologies if this is basic git stuff most people know, just putting it out there for other git-clueless folks like myself. The thing to note is that I had been previously downloading zip files and sftp the files onto norns using cyberduck. The thing I had to do to get it to work was to “clone the git repository” onto my norns via terminal first, which creates the same folder in dust. (on a side note, if you already have the script with the same folder name in your dust/code folder from earlier, you will need to delete that before cloning the git repository if it has the same folder name) THEN, once thats done you can change directory into the script folder and “git pull” to update. BRILLIANT! Some screenshots of what I mean, and the link which kinda explained wtf to do for me…
edit: also important, to get the https address you go to the github page, hit the green button for “clone or download” and then copy the text of the https and past it into terminal after punching in: git clone (copy paste https address)