$ git clone -n https://gitee.com/little-huaduo/clang.git /var/lib/mock/dist-an23-build-512969-75099/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23-build-512969-75099/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin 97262766560bc2613bd2ea16d8faaef9f1fc5505:KOJI_FETCH_HEAD
From https://gitee.com/little-huaduo/clang
 * [new ref]         97262766560bc2613bd2ea16d8faaef9f1fc5505 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9726276 Add Sw64 support for clang