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

I think I've found it....from http://www-cs-students.stanford.edu/~blynn/gitmagic/ch02.html

Sometimes you just want to go back and forget about every change past a certain point because they're all wrong.

Start with:

$ git log

which shows you a list of recent commits, and their SHA1 hashes.

Next, type:

$ git reset --hard SHA1_HASH

to restore the state to a given commit and erase all newer commits from the record permanently.