$ git clone -n https://gitee.com/renping000/llvm.git /var/lib/mock/dist-an8.6-build-191658-60742/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an8.6-build-191658-60742/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard d8e31b0cb44a5620c59854da5cbd685ecd6c6020
HEAD is now at d8e31b0 optimise spec file