Need to do a git fetch so we have full depth of tag history.

.travis.yml

@@ -34,6 +34,7 @@ after_success:
 - coveralls
 before_deploy:
 - git checkout $TRAVIS_BRANCH
+- git fetch --unshallow
 - python update_version_from_git.py
 deploy:
   - provider: pypi

update_version_from_git.py

@@ -61,7 +61,7 @@ def git_tag_name():
     return tag_branch
 
 def get_git_version_info():
-    cmd = 'git describe --tags --always'
+    cmd = 'git describe --tags'
     ver_str = subprocess.check_output(cmd, shell=True)
     ver, commits_since, githash = ver_str.decode().strip().split('-')
     return ver, commits_since, githash