Fix git issue with docker

Fix "An error has occurred: FatalError: git failed. Is it installed, and are you in a Git repository directory?" while running with docker tox 

docker run -v `pwd`:/tests -it --rm 31z4/tox tox -e style

tox.ini

@@ -31,6 +31,8 @@ commands = pytest -v --tb=short --basetemp={envtmpdir} {posargs:tests}
 [testenv:style]
 deps = pre-commit
 skip_install = true
+allowlist_externals = git
+commands_pre = git config --global --add safe.directory '*'
 commands = pre-commit run --all-files
 
 [testenv:typing]