How to achieve 'pre-checkout' hook in Git/bitbucket?

Question

Result of lots of searching on net is that pre-checkout hook in git is not implemented yet. The reason can be:

• There is no practical use.

Answer 1

Pre-checkout use case: delete un-versioned local files generated by gulp watch:css task so they are overwritten after checkout and rebuilt by gulp.

Instead, I'm just going to write a shell script that gets the repo root and then deletes any of a list of gulp-generated files found.