fatal: Could not parse object '56e7ee0b1b53a86630553cedf0b2b5892fa359b3'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at 56e7ee0 Updates to setup_virtualenv.sh
56e7ee0b1b53a86630553cedf0b2b5892fa359b3