$ git clone -n https://gitee.com/wenyuzifang/gdk-pixbuf2.git /var/lib/mock/dist-an23-build-468974-74027/root/chroot_tmpdir/scmroot/gdk-pixbuf2
Cloning into '/var/lib/mock/dist-an23-build-468974-74027/root/chroot_tmpdir/scmroot/gdk-pixbuf2'...
$ git fetch origin dff3f5597de57db3498ae9994385deab883f30b0:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/gdk-pixbuf2
 * [new ref]         dff3f5597de57db3498ae9994385deab883f30b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dff3f55 Update code from upstream