$ git clone -n https://gitee.com/wency_cn/libisoburn.git /var/lib/mock/dist-an23-build-492343-74553/root/chroot_tmpdir/scmroot/libisoburn
Cloning into '/var/lib/mock/dist-an23-build-492343-74553/root/chroot_tmpdir/scmroot/libisoburn'...
$ git fetch origin f9946d2d63522f3550ecedbe923bed0c3382e284:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/libisoburn
 * [new ref]         f9946d2d63522f3550ecedbe923bed0c3382e284 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f9946d2 Update code from upstream