$ git clone -n https://gitee.com/fundawang/llvm.git /var/lib/mock/dist-an23-build-197052-60921/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-197052-60921/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard 0f021998618bf99fcf8779f36d6fbffe8957bbb5
HEAD is now at 0f02199 15.0.7