MkRepo.java:70-70: Fix code to avoid CouplingBetweenObjects

The puzzle `1061-5da99a0c` in [`src/main/java/com/jcabi/github/mock/MkRepo.java`](https://github.com/jcabi/jcabi-github/blob/master/src/main/java/com/jcabi/github/mock/MkRepo.java) (lines 70-70) has to be resolved: Fix code to avoid CouplingBetweenObjects

The puzzle was created by Chris Rebert on 15-Apr-15.

Estimate: 30 minutes, role: IMP.

If you have any technical questions, don't ask me, submit new tickets instead. The task will be "done" when the problem is fixed and the text of the puzzle is removed from the source code. Here is more about [PDD](http://www.yegor256.com/2009/03/04/pdd.html).

Open src/main/java/com/jcabi/github/mock/MkRepo.java at line 70 and inspect the surrounding code and CouplingBetweenObjects puzzle. Run the project's Java quality checks to reproduce the warning; the work is done when the coupling issue is resolved and the puzzle text is removed from the source.

Written by the indexing model from the issue text.