$ git clone -n https://gitee.com/opencloudos-stream/ub-pkg-manager.git /var/lib/mock/dist-oc9-epol-build-245331-83303/root/chroot_tmpdir/scmroot/ub-pkg-manager
Cloning into '/var/lib/mock/dist-oc9-epol-build-245331-83303/root/chroot_tmpdir/scmroot/ub-pkg-manager'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/ub-pkg-manager
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 308d667 !1 libobmm has been updated to obmm Merge pull request !1 from qiushengming/master