Lost git SHA when using tarballs

When running the code compiled from the tars made via make dist, the code reports being

Version : 0.7.0
Revision: unknown, Branch: unknown, Date: unknown

which is not the most helpful. My recollection was that we were somehow collecting the SHA at the time of make dist and keeping it inside the Makefile somehow to keep track of what is happening. If that's the expected behaviour then it seems that it is now broken.