fatal: Could not parse object 'aa520101b87012b3862811f08a03c62179072ded'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at aa52010 oops, wrong CMakeLists, this should work instead.
aa520101b87012b3862811f08a03c62179072ded