fatal: Could not parse object '217c6cfa3e66497b91b911794ecc7cea394b8ac5'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 217c6cf Update third party libraries doc with link to NN blog
217c6cfa3e66497b91b911794ecc7cea394b8ac5