Stash before executing

[akshitkrnagpal]

This may be kind of a feature request.

Current situation
The most basic use of this is to check linting using eslint,jslint etc.
But let's consider I added (git add) a few changes. Then I try git commit. There are some errors in the code it tells me and does not let me commit.

I fix the errors and try git commit again. It checks and let me commit because I fixed the errors. But I forgot to do git add afterwards.

Linting will check the latest file (fixed files) but git commit will commit the old changes only.

PS - I know this is a job for the developer to be careful. But if everyone was careful we won't be needing this anyway.