$ git clone -n https://gitee.com/wenyuzifang/tuna_1770867594.git /var/lib/mock/dist-an23-build-513998-75110/root/chroot_tmpdir/scmroot/tuna_1770867594
Cloning into '/var/lib/mock/dist-an23-build-513998-75110/root/chroot_tmpdir/scmroot/tuna_1770867594'...
$ git fetch origin 85e279d8104244c7d0b5250ff04b018d10151e29:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tuna_1770867594
 * [new ref]         85e279d8104244c7d0b5250ff04b018d10151e29 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85e279d Update code from upstream