$ git clone -n https://gitee.com/src-opencloudos-rpms/maven-parent.git /var/lib/mock/dist-oc9-build-50562-14595/root/chroot_tmpdir/scmroot/maven-parent
Cloning into '/var/lib/mock/dist-oc9-build-50562-14595/root/chroot_tmpdir/scmroot/maven-parent'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/maven-parent
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d660e07 import maven-parent-37-3.tl4