To get the short version of a Git revision.
git rev-parse --short HEAD
The short version is the first 6 character of the sha1 that is the full version.
The following script first gets the current revision for HEAD, then calls the same command for the short revision:
$ git rev-parse HEAD edc24971b373d63023e30175aacd8fd264cc0584 $ git rev-parse --short HEAD edc2497 $