outRepo: use GitCmdObjectDB and rename getter function

Signed-off-by: Gregory M. Turner <gmt@be-evil.net>
squashme
scripts/init-upstream-tracking: add new script skeleton

Signed-off-by: Gregory M. Turner <gmt@be-evil.net>
Update README to present a somewhat less delusional picture of reality

Signed-off-by: Gregory M. Turner <gmt@be-evil.net>