$ git clone -n https://gitee.com/little-huaduo/clang.git /var/lib/mock/dist-an23.3-build-434931-73067/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23.3-build-434931-73067/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin 30add3b1cf70e1daa02f9390d66db35957d69665:KOJI_FETCH_HEAD
From https://gitee.com/little-huaduo/clang
 * [new ref]         30add3b1cf70e1daa02f9390d66db35957d69665 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 30add3b Add Sw64 support for clang