Both the branches are good for govt jobs but after your btech you must have to score a very good rank in GATE EXAMINATION HELD BY IIT to get into PSUs.

After qualifying gate your future is almost secure

For government jobs both the branches are good. You need to get good rank in GATE for PSUs.
Besides that Civil branch has great scope in construction companies and electrical branch guys can also apply for Core as well as companies that requires coding. Overall it's great scope for electrical than civil. But as far as government jobs are considered both will equally do.