following exactly the doc instructions for ceres

install_wolf.sh

@@ -197,7 +197,10 @@ fi
 # ceres
 func_echo "Installing ceres 2.0 via source..."
 cd $DEPS_PATH
-git clone --depth 1 -b 2.0.0 https://ceres-solver.googlesource.com/ceres-solver
+wget http://ceres-solver.org/ceres-solver-2.0.0.tar.gz
+tar zxf ceres-solver-2.0.0.tar.gz
+rm ceres-solver-2.0.0.tar.gz
+#git clone --depth 1 -b 2.0.0 https://ceres-solver.googlesource.com/ceres-solver
 cd ceres-solver
 mkdir -p build && cd build
 cmake -DCMAKE_BUILD_TYPE=Release ..