I was recently working on a task but needed to switch to a different task but carried on working without stashing the changes from the original task before starting the new one. Later on I needed to create a new branch and wanted to create seperate stashes for each task.
Recent versions of git provide an easy way to do this with the --staged option:
To move these changes to a new branch I run the following commands in a git terminal.
git add <some-files> # pick (stage) the files to stash
git stash save --staged 'my stash' # stash only staged