How to Reset a Blob

A blob stores no meda data. It's only the content, and it's in its size. The safer way to do this is get check out, and then a asha one of a commit. This is similar to the dashdash hard, except any changes in your working tree are preserved. So what this is saying is, hey, check out things from this particular committ idea, but if i've made any changes in my local directory, don't blow those away.