fatal: Could not parse object 'af65292d0917afd3c2f9a10a2f4aefdba9e1fa56'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at af65292 Documentation updates to remove references to tgLinearString
af65292d0917afd3c2f9a10a2f4aefdba9e1fa56