$ git clone -n https://src.fedoraproject.org/rpms/knock.git /var/lib/mock/f31-build-57287-28319/root/thebuilddir/tmp/scmroot/knock
Cloning into '/var/lib/mock/f31-build-57287-28319/root/thebuilddir/tmp/scmroot/knock'...
$ git reset --hard 0dac62e7db5cc7c9f380d438bc9836f235311683
HEAD is now at 0dac62e - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild