$ git clone -n https://gitee.com/opencloudos-stream/kf5-mailcommon.git /var/lib/mock/dist-oc9-epol-build-112178-67771/root/chroot_tmpdir/scmroot/kf5-mailcommon
Cloning into '/var/lib/mock/dist-oc9-epol-build-112178-67771/root/chroot_tmpdir/scmroot/kf5-mailcommon'...
$ git fetch origin master:KOJI_FETCH_HEAD
From https://gitee.com/opencloudos-stream/kf5-mailcommon
 * [new branch]      master     -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 56da9db update