$ git clone -n https://gitee.com/wenyuzifang/tuna.git /var/lib/mock/dist-an23-build-486879-74383/root/chroot_tmpdir/scmroot/tuna
Cloning into '/var/lib/mock/dist-an23-build-486879-74383/root/chroot_tmpdir/scmroot/tuna'...
$ git fetch origin e052d35c9e9c04d80890d65f2a714a3d1fda49af:KOJI_FETCH_HEAD
From https://gitee.com/wenyuzifang/tuna
 * [new ref]         e052d35c9e9c04d80890d65f2a714a3d1fda49af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e052d35 Update code from upstream