gitinit.cmd

cd %1
git init
echo "README" > README.md   
(echo /bin && echo /obj && echo *.log && echo *.dacpac && echo *.bacpac && echo !/refs/*.dacpac) > .gitignore
git add .

tasks.json

{
    // See https://go.microsoft.com/fwlink/?LinkId=733558
    // for the documentation about the tasks.json format
        "version": "2.0.0",
        "tasks": [
      
          {
            "label": "Git Init Project Directory",
            "type": "shell",
            "command": "gitinit.cmd ${input:pickTestDemo}",            // your command here
            "args": [
              "${input:pickTestDemo}"  // wait for the input by "id" below
            ],
            "problemMatcher": []
          }
        ],
        "inputs": [
          {
            "id": "pickTestDemo",
            "type": "command",
            "command": "folder-operations.getFoldersInWorkspace"  // returns a QuickPick element
          },
        ]
}