gistfile1.txt

# Checkout a fresh copy of the repo you want to pull the code from
git clone [email protected]:wellcomecollection/scala-SOMELIB.git

# Move into the freshly checked repo
cd scala-SOMELIB

# Filter history for a particular directory
git filter-branch --subdirectory-filter SOMELIB -- --all

# Rearrange things as you'd like them
# - Ensure things have a suitable folder name at this point
# - Commit that change
mkdir SOMELIB
mv src SOMELIB
git add SOMELIB
git commit -m "move to SOMELIB"

# Add the new repo as an origin
git remote set-url origin [email protected]:wellcomecollection/scala-libs.git

# Merge the new repo history
git pull origin master --allow-unrelated-histories

# Push the history back to master
git push origin master