try work around for travis git version issue
try work around for travis git version issue

fedenusy/warbler,idibon/warbler,ctreatma/warbler,ctreatma/warbler,ctreatma/warbler,fedenusy/warbler,ctreatma/warbler,idibon/warbler,fedenusy/warbler,idibon/warbler,idibon/warbler,fedenusy/warbler