fatal: Could not parse object 'ab57fce445c5b6aacb4d39c5ace56fdd47814a1e'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at ab57fce Merge branch 'master' of github.com:NASA-Tensegrity-Robotics-Toolkit/NTRTsim
ab57fce445c5b6aacb4d39c5ace56fdd47814a1e