fun fact, I wrote/adapted a git plugin for jira in 2008 (and 2012). The original was a subversion plugin and I changed the meat to speak git.
https://github.com/jlongman/jira-git-plugin/
The license was MIT - or I released MIT, its been a while - so someone actually sold it for a while. I considered buying my own code when I had a specific issue but had to fix it myself in 2012.
The original subversion plugin was written by one of atlassian's co-founders.










