Gregory's Server@b0rk Another great article, thanks for writing and sharing.
With checkout the '--' can be used between a branch and a file on that branch and it will copy that file from that branch to the current one. Kind of like cherry-picking files rather than whole commits.
git checkout -b new_feature # Create and checkout a new branch
git checkout old_feature_branch -- path/to/file/in/old_feature_branch