From: Sean Barag <sean@barag.org>

While the default remote name of `origin` can be overridden both
pre-clone (with `git clone --origin foo`) and post-clone (with `git
remote rename origin foo`), it'd be handy to have a configurable
system-wide default for clones!  This commit implements
`remote.cloneDefault` as a parallel to `remote.pushDefault`,
with prioritized name resolution:

1. (Highest priority) `git clone`'s `-o` option
2. `git config`'s `remote.cloneDefault` value
3. `origin`

There should be no impact for existing users, as it's pretty unlikely
that anyone's already configured `remote.cloneDefault` and the porcelain
hasn't changed (as best I can tell at least!).

Signed-off-by: Sean Barag <sean@barag.org>

Submitted-As: https://lore.kernel.org/git/pull.710.git.1598456751674.gitgitgadget@gmail.com