I have updated the information on using Tags in PETSc commit messages at https://bitbucket.org/petsc/petsc/wiki/writing-commit-messages
In particular I introduce Project: Funded-by: Time: to allow people to associated a commit with one or more specific funded work or projects. So for example one may use Funded-by: IDEAS Time: 8 hours to allow us to come back later and do searches for contributions related to particular projects. (How to search is also listed in the wiki). The wiki also indicates how one may keep a commit message template in ~/.git/gitmessage with various Tags so you don't have to remember them, git will automatically add them into your commit message editor, just remember to delete the ones that are not relevant. Barry
