nvie/gitflow — pull request #234 by baby-gnu (2012-07-09 17:03:26+00:00)
Title: hotfix/release/support start does not accept tags as base

Commit pointed by tags are reachable with ^0[1].

* gitflow-common (git_is_ancestor): Dereference tags.

Footnotes:
[1] https://www.kernel.org/pub/software/scm/git/docs/git-rev-parse.html