The base image is updated regularly (it's currently 22.04), and it's
easy to forget to update this readme, so best we simply not repeat
ourselves and instead let people look at `Dockerfile` to see exactly
which version of Ubuntu it's using.
The script assumes that the name of the remote is `origin`, but this
is not the case if the user has set `clone.defaultRemoteName` to
another value in the ~/.gitconfig (or elsewhere in the configuration).
Adding `-o origin` ensures that the remote will be called `origin`
regardless of the `clone.defaultRemoteName` setting.
Per PR #3341:
- The minimum Git version this should work with is v1.7.10. (This is not
documented in the repo itself; it's just an implicit requirement.)
- The `--origin` option was added to `git clone` in commit 98a4fef3f2 which
was released in v1.2.5. From the diff of that commit, the `-o` option was
already available at that time. So this easily satisfies the above.
- A comment in #3341 indicates that `-o` was added in v1.1.0. I've not
verified this, but we probably don't need to track that down since by the
above we're already well within requirements.
Curt J. SampsonandJordan Harband