$ git clone -n https://gitee.com/zhaohang_mskdxl/llvm-toolset.git /var/lib/mock/dist-an8.8-build-287340-64866/root/chroot_tmpdir/scmroot/llvm-toolset
Cloning into '/var/lib/mock/dist-an8.8-build-287340-64866/root/chroot_tmpdir/scmroot/llvm-toolset'...
$ git fetch origin e0234e7f6264dbdc3d07f89acbf22d5faef4c03a:KOJI_FETCH_HEAD
From https://gitee.com/zhaohang_mskdxl/llvm-toolset
 * [new ref]         e0234e7f6264dbdc3d07f89acbf22d5faef4c03a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0234e7 add loongarch64