fatal: Could not parse object 'f31a2ec4294973e720aa874c7b3abed4c534546d'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at f31a2ec Cleanup includes on CPG files, avoid exposing implementation to non-friend classes
f31a2ec4294973e720aa874c7b3abed4c534546d