Match/group output

[GavinF17]

Instead of duplicating the same output, e.g. for jock [REPOS] branch --show-current, output should be matched together along with the repo names.

e.g.

$ jock -r service1 -r service2 -r service3 -r service4 branch --show-current 
Executing git branch --show-current
> master
output by service1 service3 service4
> develop
output by service2

Above is just an example, the real format should be thought out more.