When you want to add a feature, don't work on the master branch! The master branch should always be in a working state. Instead, make a feature branch, e.g. git checkout fancy-lighting-model. Then work on that branch locally, committing to fancy-lighting-model (it's okay to push up a feature branch if you want). Then, when you are ready to merge back into master, make a pull request so that everyone has a chance to review your code changes. Then merge the branch with --no-ff so that we keep the branch history.
"This software contains Autodesk® FBX® code developed by Autodesk, Inc. Copyright 2008 Autodesk, Inc. All rights, reserved. Such code is provided "as is" and Autodesk, Inc. disclaims any and all warranties, whether express or implied, including without limitation the implied warranties of merchantability, fitness for a particular purpose or non-infringement of third party rights. In no event shall Autodesk, Inc. be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of such code."