Git usefull tasks

git_useful_tasks.sh

#!/bin/sh

# Delete last commit already pushed to a remote repository
git reset HEAD^ --hard;
git push origin -f;

# Change remote URL
git remote set-url origin <repo_url>

# Revert local changes to move back to the origin is
git reset --hard && git clean -df

# Delete local commits to remote branch
git reset --hard origin/master

# Squash commits, see: https://github.com/edx/edx-platform/wiki/How-to-Rebase-a-Pull-Request#squash-your-changes
# Checkout the branch
git checkout mybranch
# Squash all commit messages but the older (first) one. Change all pick commits with squash/s except for the older (first) one 
git rebase -i `git merge-base origin/$(git rev-parse --abbrev-ref HEAD) origin/master`
# See the history rewritten
git log
# Verify that the diff does not change
git diff origin/master
# Force push to rewrite history
git push -f

# Create and push tags
git tag -a <tag_name> -m "<tag_comment>"
git push origin <tag_name>

# Delete local tag
git tag --delete <tag>
# Delete remote tag
git push --delete <tag>   

# Create a branch from a tag and checkout to it
git checkout tags/<tag_name> -b <branch_name>

# Copy dir/file from another branch 
git checkout <branch> -- dirname/file