How to add, use and delete remotes, using Linux kernel source repo as an example.

Currently one remote:

$ git remote -v
origin	https://github.com/torvalds/linux.git (fetch)
origin	https://github.com/torvalds/linux.git (push)
$

Query linux-next before adding it as a remote:

$ git ls-remote https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

Add as a new remote with name ln:

$ git remote add ln https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git