git pull
git rm -r *
git commit
git push
Demonstration example:
git checkout <first commit hash>
git rm -r *
touch README
git add README
git commit --amend
git push -f

{"tags":[{"tag":"textarea","content":"# create a new repository that has the initial commit that you want\nmkdir foo; cd foo; git init; ...; git commit\n\n# set up a remote\ngit remote add origin <url-of-remote>\ngit branch --set-upstream master origin\/master\n\n# push your new history\ngit push -f\n\n# delete obsolete remote branches\ngit push origin :deprecated-branch","code_language":"shell"}]}

{"tags":[{"tag":"textarea","content":"mkdir reset\ncd reset\n git init\n touch README.md\n git add .\n git commit -m 'Initial commit'\n git remote add origin [email protected]:XXX\/xxx.git\n git push --force --set-upstream origin master","code_language":"shell"}]}

{"tags":[{"tag":"textarea","content":"mkdir git-remote\ncd git-remote\ngit init --bare\ncd ..\nmkdir git-local\ncd git-local\ngit clone ..\/git-remote .\ntouch a\ngit add a\ngit commit -m \"initial\"\ngit push origin master","code_language":"whatever"}]}