Sadly, this can't quite be an alias (which would be difficult to
automatically set up anyways), since we want to check if an r/number is
part of the (upstream) canon branch.
The test script for the subcommand doubles up as a soundness check for
our pipelines ref creation.
Change-Id: I840af6556e50187c69490668bd8a18dd7dc25a86
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8844
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: flokli <flokli@flokli.de>
