$ git clone -n https://gitee.com/opencloudos-stream/dovecot.git /var/lib/mock/dist-oc9-epol-build-68282-46978/root/chroot_tmpdir/scmroot/dovecot
Cloning into '/var/lib/mock/dist-oc9-epol-build-68282-46978/root/chroot_tmpdir/scmroot/dovecot'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/dovecot
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ad9f25 !4 [I8RVHT]:Rebuild for libsodium in opencloudos-stream Merge pull request !4 from ocs-bot/master