You need to set path correctly in your system environment
You need to add the following paths to PATH:
C:\Program Files\Git\bin\
C:\Program Files\Git\cmd\
You can do this By following way:

1. In the Start Menu "environment variable".
2. Select "system environment variables".
3. Click the "Environment Variables" button.
4. Double-click the "Path" entry under "System variables".
   With the "New" button in the PATH editor, add
   C:\Program Files\Git\bin\ and C:\Program Files\Git\cmd\ to the end of the list.
   Close and re-open your console.