$ git clone -n https://gitee.com/src-opencloudos-rpms/python-alembic.git /var/lib/mock/dist-oc9-build-44205-14591/root/chroot_tmpdir/scmroot/python-alembic
Cloning into '/var/lib/mock/dist-oc9-build-44205-14591/root/chroot_tmpdir/scmroot/python-alembic'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/python-alembic
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c23799 import python-alembic-1.9.3-3.tl4