$ git clone -n https://gitee.com/little-huaduo/llvm.git /var/lib/mock/dist-an23-build-512956-75099/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-512956-75099/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin abb6891b23fde60c9b1e0fff6802e3cdea991322:KOJI_FETCH_HEAD
From https://gitee.com/little-huaduo/llvm
 * [new ref]         abb6891b23fde60c9b1e0fff6802e3cdea991322 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at abb6891 Add Sw64 support for llvm