git rebase

rebase.sh

git rebase --interactive HEAD~2 # 2 being the number of commits you wish to use

# should see commits listed:

# pick <foo bar pop>
# pick <foo2 ba2r pop2>

# change the commits that should squash to `s` instead of pick:

# pick <foo bar pop>
# s <foo2 ba2r pop2>

# save quit
# save quit