$ git clone -n https://gitee.com/little-huaduo/llvm.git /var/lib/mock/dist-an23-build-503684-74854/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-503684-74854/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin 2cc16f5319f1d62e7ad1d4a9e33783a06b689e0a:KOJI_FETCH_HEAD
From https://gitee.com/little-huaduo/llvm
 * [new ref]         2cc16f5319f1d62e7ad1d4a9e33783a06b689e0a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2cc16f5 Add Sw64 support for llvm