fatal: Could not parse object 'c991056ff6251a1acdfa456c9e66c434ff10d6f7'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at c991056 Removed
c991056ff6251a1acdfa456c9e66c434ff10d6f7