$ git clone -n https://gitee.com/opencloudos-stream/GitPython.git /var/lib/mock/dist-oc9-epol-build-91969-59263/root/chroot_tmpdir/scmroot/GitPython
Cloning into '/var/lib/mock/dist-oc9-epol-build-91969-59263/root/chroot_tmpdir/scmroot/GitPython'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/GitPython
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2b4cdb7 update