git-mv-new-repo

# Instructions how to transfer several directories from one repo to another 
# while preserving the history

git clone <git dest> dest
git clone <git src> src

# Prepare the source repo
cd src
git checkout <branch from where to copy the direcoties> 

# For safety remove the original remote
git remote rm origin

# If only one directory
# git filter-branch --subdirectory-filter <directory to kepp> -- --all

# If multiple direcotries
git filter-branch -f --prune-empty --index-filter 'git rm --cached -r -q -- . ; git reset -q $GIT_COMMIT -- <dir a> <dir b>' -- --all

# Moving the directory to a different location while preserving history
~/git-mv-with-history.sh <old file>=<new file> <old file>=<new file>

# Merge the changes in the dest repo
cd ../dest
git remote add external ../src/
git checkout <branch where to merge>
git pull external <branch from the src repo> --allow-unrelated-histories