Run merge conflict resolution tools to resolve merge conflicts. More information: https://git-scm.com/docs/git-mergetool.
git mergetool
git mergetool --tool-help
git mergetool {{[-t|--tool]}} {{tool_name}}
git mergetool {{[-y|--no-prompt]}}
merge.guitool configuration variable):git mergetool {{[-g|--gui]}}
merge.tool configuration variable):git mergetool --no-gui