make repo.head a Head instead of string
make repo.head a Head instead of string

thommay/grit,rgroux/grit,patientslikeme/grit,abicky/grit,thommay/grit,HrishikeshSingh/testmodulerepo,flycutter/grit,rgroux/grit,gitcafe-dev/grit,HrishikeshSingh/testmodulerepo,renatoramiro/grit,kevinsawicki/grit,mojombo/grit,gitcafe-dev/grit,isabanin/grit,isabanin/grit,flycutter/grit,gitlabhq/grit,github/grit,gitlabhq/grit,brynary/grit,brynary/grit,redronin/grit,kevinsawicki/grit