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

As of git v2.23.0 there's a new git restore method which is supposed to assume part of what git checkout was responsible for (even the accepted answer mentions that git checkout is quite confusing). See highlights of changes on github blog.

The default behaviour of this command is to restore the state of a working tree with the content coming from the source parameter (which in your case will be a commit hash).

So based on Greg Hewgill's answer (assuming the commit hash is c5f567) the command would look like this:

git restore --source=c5f567 file1/to/restore file2/to/restore

Or if you want to restore to the content of one commit before c5f567:

git restore --source=c5f567~1 file1/to/restore file2/to/restore