four-key | measurement tool written with golang for your repositories | Functional Programming library

I would like to register the change lead time (one of the four key metrics) of different Jira tickets, that is to say, register the time since a ticket is created until it is fishished and the corresponding code reaches production.

The ticket creation event would be detected in Jira with a plugin, sending its information ({issueNumber: APP-001, creationDate: 2019-xx-xx...}) to a datatake.

The feature would be considered finished when it starts a pipeline execution that reaches production:

1. Dev commits code using a comment referencing the issue #APP-001 Finished feature and pushes it to master.

2. The Jenkins pipeline passes by different stages (build, test, deploy-uat) and finally executes the deproy-prod stage). If it finishes ok, it should register in the datalake the finished features included in the deployment.

To get the finished features I was thinking of getting commits that where included, examing their commit messages looking for the references to Jira tickets (APP-xxx).

However, my question is how can I get this list of commits? I have access to the whole git commit history but how can I get only the new commits added by the last push?