bwc checkout should fetch from all remotes
bwc checkout should fetch from all remotes

This is a regression introduced in #25510, which removed the explicit fetching of upstream. Sadly this doesn't work if you don't have any local branch referring to `upstream` as an upstream branch.

vroyer/elassandra,sneivandt/elasticsearch,mohit/elasticsearch,rajanm/elasticsearch,robin13/elasticsearch,rajanm/elasticsearch,fred84/elasticsearch,s1monw/elasticsearch,coding0011/elasticsearch,HonzaKral/elasticsearch,qwerty4030/elasticsearch,maddin2016/elasticsearch,strapdata/elassandra,ThiagoGarciaAlves/elasticsearch,HonzaKral/elasticsearch,lks21c/elasticsearch,jimczi/elasticsearch,Stacey-Gammon/elasticsearch,umeshdangat/elasticsearch,gfyoung/elasticsearch,GlenRSmith/elasticsearch,scottsom/elasticsearch,strapdata/elassandra,pozhidaevak/elasticsearch,Stacey-Gammon/elasticsearch,nknize/elasticsearch,robin13/elasticsearch,qwerty4030/elasticsearch,ThiagoGarciaAlves/elasticsearch,maddin2016/elasticsearch,pozhidaevak/elasticsearch,mjason3/elasticsearch,mjason3/elasticsearch,coding0011/elasticsearch,ThiagoGarciaAlves/elasticsearch,wangtuo/elasticsearch,kalimatas/elasticsearch,vroyer/elasticassandra,coding0011/elasticsearch,umeshdangat/elasticsearch,wenpos/elasticsearch,naveenhooda2000/elasticsearch,masaruh/elasticsearch,wangtuo/elasticsearch,wangtuo/elasticsearch,shreejay/elasticsearch,gfyoung/elasticsearch,gfyoung/elasticsearch,shreejay/elasticsearch,Stacey-Gammon/elasticsearch,kalimatas/elasticsearch,vroyer/elasticassandra,GlenRSmith/elasticsearch,jimczi/elasticsearch,wangtuo/elasticsearch,strapdata/elassandra,fred84/elasticsearch,uschindler/elasticsearch,nknize/elasticsearch,rajanm/elasticsearch,naveenhooda2000/elasticsearch,vroyer/elasticassandra,umeshdangat/elasticsearch,naveenhooda2000/elasticsearch,mjason3/elasticsearch,vroyer/elassandra,wenpos/elasticsearch,lks21c/elasticsearch,lks21c/elasticsearch,scorpionvicky/elasticsearch,lks21c/elasticsearch,gingerwizard/elasticsearch,umeshdangat/elasticsearch,scottsom/elasticsearch,scottsom/elasticsearch,vroyer/elassandra,scorpionvicky/elasticsearch,markwalkom/elasticsearch,robin13/elasticsearch,gingerwizard/elasticsearch,fred84/elasticsearch,markwalkom/elasticsearch,mjason3/elasticsearch,markwalkom/elasticsearch,GlenRSmith/elasticsearch,kalimatas/elasticsearch,strapdata/elassandra,gfyoung/elasticsearch,Stacey-Gammon/elasticsearch,markwalkom/elasticsearch,masaruh/elasticsearch,naveenhooda2000/elasticsearch,sneivandt/elasticsearch,s1monw/elasticsearch,rajanm/elasticsearch,shreejay/elasticsearch,pozhidaevak/elasticsearch,markwalkom/elasticsearch,ThiagoGarciaAlves/elasticsearch,sneivandt/elasticsearch,ThiagoGarciaAlves/elasticsearch,maddin2016/elasticsearch,gingerwizard/elasticsearch,scottsom/elasticsearch,gingerwizard/elasticsearch,fred84/elasticsearch,kalimatas/elasticsearch,GlenRSmith/elasticsearch,wangtuo/elasticsearch,rajanm/elasticsearch,mohit/elasticsearch,mjason3/elasticsearch,wenpos/elasticsearch,pozhidaevak/elasticsearch,brandonkearby/elasticsearch,kalimatas/elasticsearch,gingerwizard/elasticsearch,brandonkearby/elasticsearch,wenpos/elasticsearch,masaruh/elasticsearch,markwalkom/elasticsearch,scorpionvicky/elasticsearch,qwerty4030/elasticsearch,Stacey-Gammon/elasticsearch,uschindler/elasticsearch,fred84/elasticsearch,nknize/elasticsearch,s1monw/elasticsearch,qwerty4030/elasticsearch,jimczi/elasticsearch,shreejay/elasticsearch,coding0011/elasticsearch,lks21c/elasticsearch,coding0011/elasticsearch,scorpionvicky/elasticsearch,strapdata/elassandra,uschindler/elasticsearch,GlenRSmith/elasticsearch,robin13/elasticsearch,s1monw/elasticsearch,s1monw/elasticsearch,rajanm/elasticsearch,shreejay/elasticsearch,nknize/elasticsearch,gingerwizard/elasticsearch,wenpos/elasticsearch,maddin2016/elasticsearch,umeshdangat/elasticsearch,jimczi/elasticsearch,HonzaKral/elasticsearch,nknize/elasticsearch,brandonkearby/elasticsearch,scorpionvicky/elasticsearch,masaruh/elasticsearch,pozhidaevak/elasticsearch,gingerwizard/elasticsearch,brandonkearby/elasticsearch,jimczi/elasticsearch,ThiagoGarciaAlves/elasticsearch,mohit/elasticsearch,maddin2016/elasticsearch,qwerty4030/elasticsearch,gfyoung/elasticsearch,robin13/elasticsearch,masaruh/elasticsearch,sneivandt/elasticsearch,mohit/elasticsearch,uschindler/elasticsearch,HonzaKral/elasticsearch,sneivandt/elasticsearch,scottsom/elasticsearch,uschindler/elasticsearch,brandonkearby/elasticsearch,naveenhooda2000/elasticsearch,mohit/elasticsearch