$ git clone -n https://gitee.com/mgb01105731/llvm.git /var/lib/mock/dist-an23-build-137927-50611/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-137927-50611/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard origin/a23
HEAD is now at 599dc8b optimise spec file