static unsigned char current_commit_sha1[20];
 
-void walker_say(struct walker *walker, const char *fmt, const char *hex)
+void walker_say(struct walker *walker, const char *fmt, ...)
 {
-       if (walker->get_verbosely)
-               fprintf(stderr, fmt, hex);
+       if (walker->get_verbosely) {
+               va_list ap;
+               va_start(ap, fmt);
+               vfprintf(stderr, fmt, ap);
+               va_end(ap);
+       }
 }
 
 static void report_missing(const struct object *obj)
                if (S_ISGITLINK(entry.mode))
                        continue;
                if (S_ISDIR(entry.mode)) {
-                       struct tree *tree = lookup_tree(entry.sha1);
+                       struct tree *tree = lookup_tree(entry.oid->hash);
                        if (tree)
                                obj = &tree->object;
                }
                else {
-                       struct blob *blob = lookup_blob(entry.sha1);
+                       struct blob *blob = lookup_blob(entry.oid->hash);
                        if (blob)
                                obj = &blob->object;
                }
                char *rf_one = NULL;
                char *tg_one;
 
-               if (strbuf_getline(&buf, stdin, '\n') == EOF)
+               if (strbuf_getline_lf(&buf, stdin) == EOF)
                        break;
                tg_one = buf.buf;
                rf_one = strchr(tg_one, '\t');