How can I reset or revert a file to a specific revision?

Question

I have made some changes to a file which has been committed a few times as part of a group of files, but now want to reset/revert the changes on it back to a previous versio

Answer 1

Use git log to obtain the hash key for specific version and then use git checkout

Note: Do not forget to type the hash before the last one. Last hash points your current position (HEAD) and changes nothing.