Answer by upe for Git push existing repo to a new and different remote repo server?

Here is a manual way to do git remote set-url origin [new repo URL]:

1. Clone the repository: git clone <old remote>
2. Create a GitHub repository

3. Open <repository>/.git/config

   $ git config -e

   [core]    repositoryformatversion = 0    filemode = false    bare = false    logallrefupdates = true    symlinks = false    ignorecase = true[remote "origin"]    url = <old remote>    fetch = +refs/heads/*:refs/remotes/origin/*[branch "master"]    remote = origin    merge = refs/heads/master

   and change the remote (the url option)

   [remote "origin"]    url = <new remote>    fetch = +refs/heads/*:refs/remotes/origin/*

4. Push the repository to GitHub: git push

You can also use both/multiple remotes.