Git: how to delete all commits except last one

Question

I load on git some project which contains some personal data. Now I changed all lines and commit it. Now I need to erase all commits except last one to prevent loosing personal data.

Answer 1

Given that your main branch is called master, and you want to remove all commits except the last one from your master:

1. git checkout --orphan tmp
2. git add . --all
3. git commit -m "Init."
4. git push origin tmp
5. On your remote git repo select tmp as main branch
6. git branch -D master
7. git push origin :master
8. git checkout -b master
9. git push origin master
10. On your remote git repo select master as main branch
11. git branch -D tmp
12. git push origin :tmp