$ git clone -n https://gitee.com/fundawang/llvm.git /var/lib/mock/dist-an23-build-189863-60753/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-189863-60753/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin 00fc66a09e97c94837e8d487b21a3804e621c74c:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/llvm
 * [new ref]         00fc66a09e97c94837e8d487b21a3804e621c74c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 00fc66a fix flag