How to check commit log of the particular file on Git or Bitbucket using terminal

How to check commit log of the particular file on Git or Bitbucket 

sudo git log -- app/code/local/jaydip/kansagra/controllers/CountryController.php

How do I delete/reset unpushed commits on Git / Bitbucket

Delete the most recent commit, keeping the work you've done:

git reset --soft HEAD~1

Delete the most recent commit, destroying the work you've done:

git reset --hard HEAD~1