strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
strbuf_release(&oldref);
strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
strbuf_release(&newref);
if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)
strbuf_addf(&oldsection, "branch.%s", oldref.buf + 11);
strbuf_release(&oldref);
strbuf_addf(&newsection, "branch.%s", newref.buf + 11);
strbuf_release(&newref);
if (git_config_rename_section(oldsection.buf, newsection.buf) < 0)