$ git clone -n https://gitee.com/fundawang/llvm.git /var/lib/mock/dist-an23-build-284559-64755/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-284559-64755/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin 0954a222e578e2284c729d1c370f8a0afa48fb8e:KOJI_FETCH_HEAD
From https://gitee.com/fundawang/llvm
 * [new ref]         0954a222e578e2284c729d1c370f8a0afa48fb8e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0954a22 16.0.6