runcmd @git, qw(commit --allow-empty -q -m M-WORKTREE);
my $mdebug = git_rev_parse 'HEAD';
printdebug sprintf "merge_series done debug=%s\n", $mdebug;
runcmd @git, qw(commit --allow-empty -q -m M-WORKTREE);
my $mdebug = git_rev_parse 'HEAD';
printdebug sprintf "merge_series done debug=%s\n", $mdebug;