(foudres) cloud-init % git-describe --tags --long
0.7.6-1021-g4264783
(foudres) cloud-init % git tag 0.7.7
(foudres) cloud-init % git-describe --tags --long
0.7.7-0-g4264783
(foudres) cloud-init % vi TODO.rst 
(foudres) cloud-init % git commit -as -m "one commit" 
[test-me c490af5] one commit
 1 file changed, 2 insertions(+)
(foudres) cloud-init % git-describe --tags --long
0.7.7-1-gc490af5
(foudres) cloud-init % vi TODO.rst 
(foudres) cloud-init % git commit -as -m "two commit" 
[test-me e5dc0f2] two commit
 1 file changed, 1 insertion(+)
(foudres) cloud-init % git-describe --tags --long
0.7.7-2-ge5dc0f2