fatal: Could not parse object 'c37f8b5daa68e38b24294e5be739b816978b085c'.
From https://github.com/NASA-Tensegrity-Robotics-Toolkit/NTRTsim
 * branch            master     -> FETCH_HEAD
HEAD is now at c37f8b5 Updated JSONCPP_URL to current head.
c37f8b5daa68e38b24294e5be739b816978b085c