fetch: set dummy function for local fetch
fetch: set dummy function for local fetch

Local fetch isn't implemented yet. Don't segfault on call, but set a
dummy for negotiate_fetch and terminate gracefully.

Reported-by: Brad Harder <cc11d21f390cfe49665e3e0896862ead5eaa1cf2@methodlogic.net>

MrHacky/libgit2,joshtriplett/libgit2,sim0629/libgit2,jflesch/libgit2-mariadb,iankronquist/libgit2,sygool/libgit2,amyvmiwei/libgit2,nokiddin/libgit2,mcanthony/libgit2,oaastest/libgit2,dleehr/libgit2,kenprice/libgit2,yosefhackmon/libgit2,sim0629/libgit2,spraints/libgit2,Corillian/libgit2,t0xicCode/libgit2,rcorre/libgit2,yongthecoder/libgit2,maxiaoqian/libgit2,oaastest/libgit2,falqas/libgit2,evhan/libgit2,Corillian/libgit2,swisspol/DEMO-libgit2,rcorre/libgit2,falqas/libgit2,Corillian/libgit2,kissthink/libgit2,nacho/libgit2,leoyanggit/libgit2,iankronquist/libgit2,t0xicCode/libgit2,Aorjoa/libgit2_maked_lib,skabel/manguse,mrksrm/Mingijura,nokiddin/libgit2,zodiac/libgit2.js,t0xicCode/libgit2,skabel/manguse,oaastest/libgit2,stewid/libgit2,chiayolin/libgit2,whoisj/libgit2,t0xicCode/libgit2,magnus98/TEST,claudelee/libgit2,rcorre/libgit2,magnus98/TEST,kissthink/libgit2,since2014/libgit2,magnus98/TEST,KTXSoftware/libgit2,kenprice/libgit2,evhan/libgit2,swisspol/DEMO-libgit2,kissthink/libgit2,kissthink/libgit2,jeffhostetler/public_libgit2,dleehr/libgit2,falqas/libgit2,iankronquist/libgit2,JIghtuse/libgit2,KTXSoftware/libgit2,Snazz2001/libgit2,mingyaaaa/libgit2,mrksrm/Mingijura,zodiac/libgit2.js,magnus98/TEST,JIghtuse/libgit2,Aorjoa/libgit2_maked_lib,yosefhackmon/libgit2,iankronquist/libgit2,yosefhackmon/libgit2,jamieleecool/ptest,yosefhackmon/libgit2,chiayolin/libgit2,stewid/libgit2,skabel/manguse,jflesch/libgit2-mariadb,falqas/libgit2,dleehr/libgit2,jeffhostetler/public_libgit2,maxiaoqian/libgit2,yongthecoder/libgit2,KTXSoftware/libgit2,mhp/libgit2,sim0629/libgit2,Tousiph/Demo1,Snazz2001/libgit2,JIghtuse/libgit2,whoisj/libgit2,yosefhackmon/libgit2,dleehr/libgit2,raybrad/libit2,mrksrm/Mingijura,iankronquist/libgit2,yosefhackmon/libgit2,leoyanggit/libgit2,joshtriplett/libgit2,claudelee/libgit2,nokiddin/libgit2,joshtriplett/libgit2,KTXSoftware/libgit2,maxiaoqian/libgit2,joshtriplett/libgit2,mrksrm/Mingijura,Tousiph/Demo1,kenprice/libgit2,Aorjoa/libgit2_maked_lib,mhp/libgit2,falqas/libgit2,mcanthony/libgit2,maxiaoqian/libgit2,linquize/libgit2,claudelee/libgit2,saurabhsuniljain/libgit2,mingyaaaa/libgit2,Aorjoa/libgit2_maked_lib,Tousiph/Demo1,JIghtuse/libgit2,saurabhsuniljain/libgit2,Corillian/libgit2,leoyanggit/libgit2,swisspol/DEMO-libgit2,skabel/manguse,mingyaaaa/libgit2,magnus98/TEST,Corillian/libgit2,Snazz2001/libgit2,leoyanggit/libgit2,mingyaaaa/libgit2,saurabhsuniljain/libgit2,MrHacky/libgit2,leoyanggit/libgit2,amyvmiwei/libgit2,mhp/libgit2,saurabhsuniljain/libgit2,sim0629/libgit2,jamieleecool/ptest,stewid/libgit2,spraints/libgit2,claudelee/libgit2,whoisj/libgit2,maxiaoqian/libgit2,raybrad/libit2,JIghtuse/libgit2,evhan/libgit2,KTXSoftware/libgit2,rcorre/libgit2,skabel/manguse,sim0629/libgit2,Tousiph/Demo1,ardumont/libgit2,rcorre/libgit2,yongthecoder/libgit2,jeffhostetler/public_libgit2,yongthecoder/libgit2,MrHacky/libgit2,stewid/libgit2,spraints/libgit2,joshtriplett/libgit2,t0xicCode/libgit2,Tousiph/Demo1,jeffhostetler/public_libgit2,Snazz2001/libgit2,Aorjoa/libgit2_maked_lib,saurabhsuniljain/libgit2,ardumont/libgit2,linquize/libgit2,jflesch/libgit2-mariadb,ardumont/libgit2,mhp/libgit2,jflesch/libgit2-mariadb,jflesch/libgit2-mariadb,linquize/libgit2,swisspol/DEMO-libgit2,JIghtuse/libgit2,dleehr/libgit2,jamieleecool/ptest,mcanthony/libgit2,whoisj/libgit2,kissthink/libgit2,mrksrm/Mingijura,sygool/libgit2,nokiddin/libgit2,claudelee/libgit2,zodiac/libgit2.js,Snazz2001/libgit2,since2014/libgit2,oaastest/libgit2,sygool/libgit2,ardumont/libgit2,mingyaaaa/libgit2,MrHacky/libgit2,linquize/libgit2,sygool/libgit2,zodiac/libgit2.js,Snazz2001/libgit2,nacho/libgit2,saurabhsuniljain/libgit2,amyvmiwei/libgit2,kenprice/libgit2,nokiddin/libgit2,ardumont/libgit2,dleehr/libgit2,linquize/libgit2,ardumont/libgit2,since2014/libgit2,spraints/libgit2,yongthecoder/libgit2,mhp/libgit2,zodiac/libgit2.js,raybrad/libit2,jamieleecool/ptest,linquize/libgit2,amyvmiwei/libgit2,sygool/libgit2,since2014/libgit2,whoisj/libgit2,t0xicCode/libgit2,spraints/libgit2,mcanthony/libgit2,yongthecoder/libgit2,chiayolin/libgit2,chiayolin/libgit2,raybrad/libit2,magnus98/TEST,whoisj/libgit2,MrHacky/libgit2,amyvmiwei/libgit2,chiayolin/libgit2,maxiaoqian/libgit2,kissthink/libgit2,stewid/libgit2,spraints/libgit2,chiayolin/libgit2,kenprice/libgit2,kenprice/libgit2,sim0629/libgit2,raybrad/libit2,nacho/libgit2,mingyaaaa/libgit2,rcorre/libgit2,mcanthony/libgit2,KTXSoftware/libgit2,mhp/libgit2,jflesch/libgit2-mariadb,sygool/libgit2,falqas/libgit2,claudelee/libgit2,evhan/libgit2,oaastest/libgit2,mrksrm/Mingijura,nokiddin/libgit2,since2014/libgit2,Corillian/libgit2,Tousiph/Demo1,jeffhostetler/public_libgit2,stewid/libgit2,swisspol/DEMO-libgit2,leoyanggit/libgit2,nacho/libgit2,swisspol/DEMO-libgit2,mcanthony/libgit2,since2014/libgit2,jeffhostetler/public_libgit2,amyvmiwei/libgit2,skabel/manguse,joshtriplett/libgit2,iankronquist/libgit2,oaastest/libgit2,MrHacky/libgit2