Squash Multiple commits of feature branch into one single commit

Count the Commits: Determine how many commits you want to squash (say 5).

Start Interactive Rebase:
Run the following command (replace 5 with the number of commits):

git rebase -i HEAD~5
Mark Commits for Squashing:
An editor will open listing your commits. Keep the first commit as pick and change the rest from pick to squash (or s):

pick abc123 First commit message
squash def456 Second commit message
squash ghi789 Third commit message
squash jkl012 Fourth commit message
squash mno345 Fifth commit message

Edit the Commit Message:
After saving, another editor prompt will let you combine and edit the commit messages. Replace them with your new message, then save and exit.

Finalize:
The commits will be squashed into a single commit with your new commit message. If you’ve already pushed these commits, you’ll need to force push:

git push --force origin <branch-name>