{
if (argc == 3 && !strcmp(argv[1], "--branch")) {
struct strbuf sb = STRBUF_INIT;
- strbuf_branchname(&sb, argv[2]);
- strbuf_splice(&sb, 0, 0, "refs/heads/", 11);
- if (check_ref_format(sb.buf))
+
+ if (strbuf_check_branch_ref(&sb, argv[2]))
die("'%s' is not a valid branch name", argv[2]);
printf("%s\n", sb.buf + 11);
exit(0);