$ git clone -n https://gitee.com/lizhao2025/clang.git /var/lib/mock/dist-an23-build-499770-74764/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23-build-499770-74764/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin 7a776c9ce774a2c6eb8d05de785ba71d8fa85566:KOJI_FETCH_HEAD
From https://gitee.com/lizhao2025/clang
 * [new ref]         7a776c9ce774a2c6eb8d05de785ba71d8fa85566 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a776c9 Update code from upstream