Managing branches

Checkout a remote branch to a new local branch

git pull
git checkout -b local-branch origin/remote-branch

Remove a remote branch (e.g. from Github once merged)

git push origin --delete <branchName>

Managing submodules

Move a submodule

mv dir/submodule newdir/submodule
Edit newdir/submodules/.git file to point to parent .git/modules/submodule dir
Edit ./git/modules/submodule/config and update worktree path
Edit .gitsubmodules in parent to update submodule path
git add -u
git add newdir/submodule