Useful if you want to pull a directory, and its commit history, out into a new repo.
# Clone the repository into a new directory.
git clone _.git
# Get only the files and commits impacting a particular directory.
# This should be the name of the directory only; if using PowerShell or the like make sure it does not include path information.
# <branchName> is the name of the default branch, generally master.
git filter-branch --prune-empty --subdirectory-filter <pathToDirectory> <branchName>
# View and then update your remotes with the new repo location.
git remote -v
git remote set-url origin _.git
git push -u origin <branchName>