$ git clone -n https://gitee.com/opencloudos-stream/git-octopus.git /var/lib/mock/dist-oc9-epol-build-102151-65967/root/chroot_tmpdir/scmroot/git-octopus
Cloning into '/var/lib/mock/dist-oc9-epol-build-102151-65967/root/chroot_tmpdir/scmroot/git-octopus'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/git-octopus
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de5f37a update