Describes the cause and action for error messages.
Error Message(English)：
unable to resolve
git fetchできない【git】 - DRYな備忘録
http://otiai10.hatenablog.com/entry/2013/12/14/123117
Error push/pull on github: Unable to resolve github.com - Stack ...
https://stackoverflow.com/questions/27739188/error-push-pull-on-github-unable-to-resolve-github-com
git pull fails "unable to resolve reference" "unable to update ...
https://stackoverflow.com/questions/2998832/git-pull-fails-unable-to-resolve-reference-unable-to-upd・・・
Unable to resolve github.com from OpenShift origin pods
https://stackoverflow.com/questions/41526628/unable-to-resolve-github-com-from-openshift-origin-pods・・・
Git unable to resolve references when pushing
https://stackoverflow.com/questions/23749886/git-unable-to-resolve-references-when-pushing
On git pull, "unable to resolve reference" and "Undefined error ...
https://stackoverflow.com/questions/12606946/on-git-pull-unable-to-resolve-reference-and-undefined-e・・・
gitでfooとfoo/barというブランチは同時には作成できない - Qiita
https://qiita.com/yaotti/items/d73e5cdb1f8ace60365f
sudo: unable to resolve host が表示されたら - Qiita
https://qiita.com/ogomr/items/89e19829eb8cc08fcebb
ReactNativeでのプッシュ通知実装 ・ Issue #954 ・ NIFCloud ... - GitHub
https://github.com/NIFCloud-mbaas/UserCommunity/issues/954