fatal: Could not parse object '5b54bf967db522d63ab8feb5d7f67e0b9f89769b'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 5b54bf9 Merge branch 'master' of github.com:NASA-Tensegrity-Robotics-Toolkit/NTRTsim
5b54bf967db522d63ab8feb5d7f67e0b9f89769b