$ git clone -n https://gitee.com/opencloudos-stream/alembic.git /var/lib/mock/dist-oc9-epol-build-253800-84331/root/chroot_tmpdir/scmroot/alembic
Cloning into '/var/lib/mock/dist-oc9-epol-build-253800-84331/root/chroot_tmpdir/scmroot/alembic'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/alembic
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fcfa0f7 !2 Upgrade alembic to 1.8.12 Merge pull request !2 from ocs-bot/agent/upg-311