$ git clone -n https://gitee.com/src-opencloudos-rpms/py3c.git /var/lib/mock/dist-oc9-build-71513-47564/root/chroot_tmpdir/scmroot/py3c
Cloning into '/var/lib/mock/dist-oc9-build-71513-47564/root/chroot_tmpdir/scmroot/py3c'...
$ git fetch origin oc9:KOJI_FETCH_HEAD
From https://gitee.com/src-opencloudos-rpms/py3c
 * [new branch]      oc9        -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2285a71 import py3c-1.4-4.tl4