Answer by GuyStalks for Undoing a git rebase

Another way that doesn't require doing a hard reset is to create a new branch with your desired starting point.

As with the other solutions, you use the reflog to find the correct starting point.

git reflog

(you can also use git log -g here for more detail)

Then you note the reference to the commit SHA (ex: e86a52b851e).

Finally, you use the git branch command.

git branch recover-branch e86a52b851e

Reference: https://git-scm.com/book/en/v2/Git-Internals-Maintenance-and-Data-Recovery#_data_recovery