add git clean command that removes all non-tracked files, creating a fresh repo
"dependencies": "cross-os dependencies",
"dependencies:darwin:win32": "conda install -y --file requirements-dependencies-only.txt",
"dependencies:linux": "export INSTALL_ON_LINUX=1 && pip install -r requirements-dependencies-only.txt",
+ "git:clean": "git clean -fxd",
"install:dev": "pip install -r requirements-development.txt",
"install:prod": "pip install -r requirements.txt",
"lerna:bootstrap": "lerna bootstrap && pip install -e .",
