$ git clone -n https://gitee.com/src-anolis-dde/onboard.git /var/lib/mock/dist-an8.9-dde-build-295001-65223/root/chroot_tmpdir/scmroot/onboard
Cloning into '/var/lib/mock/dist-an8.9-dde-build-295001-65223/root/chroot_tmpdir/scmroot/onboard'...
$ git fetch origin a8:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-dde/onboard
 * [new branch]      a8         -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 70f9ecc rebuild for anolis 8.9