Emocmrsp was available under $ORACLE_HOME/OPatch/ocm/bin in 12cR1 and 11G databases. It is deprecated now in new Opatch 12cR2. It is discussed in Oracle metalink notes (Doc ID 1591616.1).
When I have downloaded the latest p6880880_122010_Linux-x86-64.zip and applied it, there was no emocmrsp file. The best part is, you don't need to generate it anymore and at the same time do not even need to add a tail to your opatchauto apply command.
The new feature of the Opatch utility 12cR2 gives you a clear description of OPatchauto session completed and time taken to complete the session like below:
OPatchauto session completed at Fri Mar 2 12:07:08 2018
Time is taken to complete the session 1 minute, 36 seconds
Happy Patching and learning :).
