> diff --git a/builtin/bisect--helper.c b/builtin/bisect--helper.c
> index ab0580ce0089a..4ac175c49e80c 100644
> --- a/builtin/bisect--helper.c
> +++ b/builtin/bisect--helper.c
> + /*
> + * Check if we are bisecting
> + */
> + if (!is_empty_or_missing_file(git_path_bisect_start())) {
> + /* Reset to the rev from where we started */
> + strbuf_read_file(&start_head, git_path_bisect_start(), 0);
> + strbuf_trim(&start_head);
> + if (!no_checkout) {
> + struct argv_array argv = ARGV_ARRAY_INIT;
> +
> + argv_array_pushl(&argv, "checkout", start_head.buf,
> + "--", NULL);
> + if (run_command_v_opt(argv.argv, RUN_GIT_CMD)) {
> + error(_("checking out '%s' failed. Try 'git "
> + "bisect start <valid-branch>'."),
> + start_head.buf);
> + goto fail;
> + }
> + }
> + } else {
> + /* Get the rev from where we start. */
> + if (!get_oid(head, &head_oid) &&
> + !starts_with(head, "refs/heads/")) {
> + strbuf_reset(&start_head);
> + strbuf_addstr(&start_head, sha1_to_hex(head_oid.hash));
Please use oid_to_hex(&head_oid) instead of sha1_to_hex().
