Steps:
1) Download git for windows https://git-scm.com/downloads
2) Install downloaded git with default setup
3) From Android Studio close if any project is open then Click on Configure -> Settings -> Version Control -> Git
4) Change Path to Git executable : git.exe to C:\Program Files\Git\cmd\git.exe
5) Apply and Ok
6) Try to clone from Check out project from Version Control
7) Done