Create a new Git repo from and old repo

How to extend an old repository as a full copy in a new repository. This preserves the history of the old repository. Future changes will not affect the old repository, but will be committed to the new repository.

This originally came from the info found at: http://stackoverflow.com/questions/10963878/how-do-you-fork-your-own-project-on-github

// This makes the new repo as a checkout of the old repo to a new directory.
# git clone https://github.com/nicholls-state-university/nicholls-2012-core.git nicholls-2015-core
// Change directory to new repo area
# cd nicholls-2015-core
// Change the origin to the new repo. Remember to make the new repo area.
# git remote set-url origin https://github.com/nicholls-state-university/nicholls-2015-core.git
// Push commits to new area.
# git push origin master
// Push all changes to repo, just making sure.
# git push --all