Read current git branch using vscode extension

Question

While I am developing the extension for Visual Studio code (vscode), I asked myself how to read git refs correctly, as the current branch, using my own methods.

My current solutions are more like a workaround:

• choose git path
• run git rev-parse', '--abbrev-ref', 'HEAD'
• returns stdout as a string and is placed in a variable (e.g. master)

Full implemented method here (forked extension gitHistoryVSCode)

Any other ideas like how to access extension methods / git or model properties?