I have a large source file and I want to split it into two pieces. I want to preserve the history so someone can start at either of the copies and work back to the original file. I see folks talking about a "git copy" at https://stackoverflow.com/a/44036771, but I am not really following what is happening with moves and merges and the other extra commands. Can someone please provide the commands to copy the file using Git. Thanks in advance.