Rebase feature branch on top of squashed feature-base branch commit

rebase-feature-branch-on-squashed-commit.sh

# optionally set editor to the modern https://github.com/zyedidia/micro editor
git config --global core.editor micro

# find next commit after common commit of the long running side branches
COMMON_COMMIT="$(git merge-base long-running-feature-branch feature-branch-development)"

# get next to common commit
git log --pretty=format:"%h" "$COMMON_COMMIT...feature-branch-development" | tail -n1
> 50b1ed6 

git checkout feature-branch-development
# drop all commits before commit from the prev command
git rebase --interactive master