$ git clone -n https://gitee.com/opencloudos-stream/catimg.git /var/lib/mock/dist-oc9-epol-build-79179-53306/root/chroot_tmpdir/scmroot/catimg
Cloning into '/var/lib/mock/dist-oc9-epol-build-79179-53306/root/chroot_tmpdir/scmroot/catimg'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/catimg
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7e950d2 package init