Fix GH-1867: non-deterministic name for git editables on Python 3
Fix GH-1867: non-deterministic name for git editables on Python 3

Determine names_by_commit deterministically.

jasonkying/pip,zorosteven/pip,rbtcollins/pip,willingc/pip,Carreau/pip,prasaianooz/pip,dstufft/pip,jythontools/pip,RonnyPfannschmidt/pip,jythontools/pip,jamezpolley/pip,James-Firth/pip,RonnyPfannschmidt/pip,zvezdan/pip,nthall/pip,mindw/pip,natefoo/pip,blarghmatey/pip,pjdelport/pip,qbdsoft/pip,chaoallsome/pip,patricklaw/pip,atdaemon/pip,tdsmith/pip,Gabriel439/pip,habnabit/pip,RonnyPfannschmidt/pip,willingc/pip,h4ck3rm1k3/pip,zorosteven/pip,alex/pip,jamezpolley/pip,pradyunsg/pip,harrisonfeng/pip,dstufft/pip,sbidoul/pip,chaoallsome/pip,pradyunsg/pip,Carreau/pip,yati-sagade/pip,zenlambda/pip,caosmo/pip,fiber-space/pip,haridsv/pip,sigmavirus24/pip,mujiansu/pip,atdaemon/pip,alex/pip,rouge8/pip,ncoghlan/pip,qbdsoft/pip,jmagnusson/pip,xavfernandez/pip,pypa/pip,luzfcb/pip,habnabit/pip,blarghmatey/pip,pfmoore/pip,natefoo/pip,rbtcollins/pip,luzfcb/pip,benesch/pip,squidsoup/pip,jythontools/pip,yati-sagade/pip,James-Firth/pip,sbidoul/pip,h4ck3rm1k3/pip,James-Firth/pip,benesch/pip,pypa/pip,prasaianooz/pip,esc/pip,fiber-space/pip,xavfernandez/pip,alex/pip,supriyantomaftuh/pip,sigmavirus24/pip,erikrose/pip,ncoghlan/pip,fiber-space/pip,haridsv/pip,zenlambda/pip,harrisonfeng/pip,ChristopherHogan/pip,KarelJakubec/pip,msabramo/pip,ChristopherHogan/pip,graingert/pip,sigmavirus24/pip,prasaianooz/pip,mujiansu/pip,xavfernandez/pip,zorosteven/pip,nthall/pip,msabramo/pip,nthall/pip,techtonik/pip,willingc/pip,dstufft/pip,erikrose/pip,davidovich/pip,techtonik/pip,jmagnusson/pip,rbtcollins/pip,luzfcb/pip,ianw/pip,rouge8/pip,qbdsoft/pip,supriyantomaftuh/pip,wkeyword/pip,ncoghlan/pip,jasonkying/pip,benesch/pip,zvezdan/pip,h4ck3rm1k3/pip,supriyantomaftuh/pip,esc/pip,rouge8/pip,techtonik/pip,graingert/pip,pjdelport/pip,erikrose/pip,jasonkying/pip,atdaemon/pip,natefoo/pip,zvezdan/pip,harrisonfeng/pip,mindw/pip,jamezpolley/pip,davidovich/pip,jmagnusson/pip,graingert/pip,caosmo/pip,zenlambda/pip,KarelJakubec/pip,Gabriel439/pip,esc/pip,ChristopherHogan/pip,ianw/pip,squidsoup/pip,pjdelport/pip,yati-sagade/pip,wkeyword/pip,chaoallsome/pip,KarelJakubec/pip,pfmoore/pip,davidovich/pip,Gabriel439/pip,habnabit/pip,patricklaw/pip,haridsv/pip,tdsmith/pip,caosmo/pip,mujiansu/pip,blarghmatey/pip,squidsoup/pip,tdsmith/pip,wkeyword/pip,mindw/pip