Run git log --pretty=oneline
to log your commits history, assume after run it, you have this:
aedb68e3f87cf3df01b73a18e71fbcbbb5d30071 commit 3
efd0274052ab449bfe6c6ac64f595b095717d680 commit 2
53ece1e4c61e74a4d44371e2dd3215af3ba3a146 commit 1
6d618ffbb605e686b6f9c4da8c169e8e5d091c9a commit 0