This GIT Command Saved Me Hours Of Work
When sometimes I am guilty of making big PRs I didn't know what to do until my colleague showed me this trick using git checkout command.
Note: Starting from Git 2.23 some of the git checkout functionality has been replaced with two other commands - git switch and git restore. So things shown in this video should be possible not only with git checkout but also with git restore:
git restore --source branch-name path/to/file