If I go to https://github.com/wesm/pandas and click the “Download” button to download a zip (or tar) archive of the repository, the file name of the archive I get is:
wesm-pandas-0.3.0-93-g1d40e65.zip
I can see that wesm-pandas represents the project name, and 0.3.0 represents the project version.
Does 93 represent the number of commits on that branch?
What does g1d40e65 represent?
After the username and the project, the filename is obtained from the output of:
Example from the man page:
http://www.kernel.org/pub/software/scm/git/docs/git-describe.html
So in your case, 93 is the number of commits since 0.3.0 and the hex after g is the sha1 of the latest commit