$ git clone -n https://gitee.com/xinlong-chen/llvm /var/lib/mock/dist-oc9-epol-build-230438-81468/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-oc9-epol-build-230438-81468/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/xinlong-chen/llvm
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9356d7d fix mlir files