My upstream remote is named origin, so commit-message-lint was always
complaining at me. Detect the right remote name from the output of
`git remote -v`.
Signed-off-by: Anders Kaseorg <anders@zulipchat.com>
/bin/sh and /usr/bin/env are the only two binaries that NixOS provides
at a fixed path (outside a buildFHSUserEnv sandbox).
This discussion was split from #11004.
Signed-off-by: Anders Kaseorg <andersk@mit.edu>