helper fuctions for making git snapshots
More and more project goes for git only releases. We should make some helper functions to abuild or make a separate tool to help make git snapshots.
- the snapshot date should be the date of the last commit, not the date the snapshot was made
- support for tags
- standard location to scp upload the snapshot where alpine devs have write access (on git.a.o?)
(from redmine: issue id 872, created on 2011-12-14, closed on 2012-05-07)