$ git clone -n https://src.fedoraproject.org/rpms/rubygem-em-websocket-client.git /var/lib/mock/f29-build-421-301/root/thebuilddir/tmp/scmroot/rubygem-em-websocket-client
Cloning into '/var/lib/mock/f29-build-421-301/root/thebuilddir/tmp/scmroot/rubygem-em-websocket-client'...
$ git reset --hard e8d85d8bcd241b31bca863883086eb74bfee5624
HEAD is now at e8d85d8 Initial import (#1554033).