my @cmd = (@git, qw(commit-tree), $bw_tree);
push @cmd, qw(-p), $old_bw, qw(-p), $new_upstream;
push @cmd, qw(-m), "Update to upstream $new_upstream_version";
push @cmd, qw(-m),
"[git-debrebase new-upstream breakwater $new_upstream_version]";
my @cmd = (@git, qw(commit-tree), $bw_tree);
push @cmd, qw(-p), $old_bw, qw(-p), $new_upstream;
push @cmd, qw(-m), "Update to upstream $new_upstream_version";
push @cmd, qw(-m),
"[git-debrebase new-upstream breakwater $new_upstream_version]";