header(pair->one->sha1, pair->one->path, pair->one->mode,
pair->two->sha1, pair->two->path, pair->two->mode);
if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
header(pair->one->sha1, pair->one->path, pair->one->mode,
pair->two->sha1, pair->two->path, pair->two->mode);
if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {