Add two push remote
1git remote add origin git@github.com:xxx/a.git
2git remote -v
3#origin git@github.com:xxx/a.git (fetch)
4#origin git@github.com:xxx/a.git (push)
5git remote set-url --add origin git@codeberg.org:xxx/a.git
6git remote -v
7#origin git@github.com:xxx/a.git (fetch)
8#origin git@github.com:xxx/a.git (push)
9#origin git@codeberg.org:xxx/a.git (push)