if ! is-true "$(command git rev-parse --is-inside-work-tree 2> /dev/null)"; then
print "${0}: not a repository work tree: ${PWD}" >&2
return 1
fi
command git fsck --unreachable 2> /dev/null \
| grep 'commit' \
| awk '{print $3}' \
| command git log \
--pretty=format:${_git_log_oneline_format} \
--extended-regexp \
--grep="${1:-(WIP )?[Oo]n [^:]+:}" \
--merges \
--no-walk \
--stdin
