$ git clone -n https://gitee.com/wency_cn/libnbd_1770907839.git /var/lib/mock/dist-an23-build-514211-75110/root/chroot_tmpdir/scmroot/libnbd_1770907839
Cloning into '/var/lib/mock/dist-an23-build-514211-75110/root/chroot_tmpdir/scmroot/libnbd_1770907839'...
$ git fetch origin f70ed7ec6d25936a6ab1879aa2c3d0e3cdbd2b11:KOJI_FETCH_HEAD
From https://gitee.com/wency_cn/libnbd_1770907839
 * [new ref]         f70ed7ec6d25936a6ab1879aa2c3d0e3cdbd2b11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f70ed7e Update code from upstream