$ git clone -n https://gitee.com/mgb01105731/llvm.git /var/lib/mock/dist-an23-build-139164-51771/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-139164-51771/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard bcc26d0df8c405dedc7c3aae919cff565e949dc9
HEAD is now at bcc26d0  optimise spec file