GitVersion fails on hotfix branches

[Mike Anderson]

When GitVersion is called during a build from a hotfix branch, we get an error. It currently works perfectly on all other branches other than a hotfix branch. Here is our build log showing the error:

11-Apr-2016 14:34:46    Executing C:\Program Files\Git\cmd\git.exe rev-parse --abbrev-ref HEAD
11-Apr-2016 14:34:46    hotfix/1.22.8
11-Apr-2016 14:34:46    Executing C:\ProgramData\Chocolatey\Bin\GitVersion.exe
11-Apr-2016 14:35:46    Error executing GitVersion
31-Dec-1969 17:00:00    
11-Apr-2016 14:35:46    Finished task 'GitVersion' with result: Failed

[Mike Anderson]

@carolynvs Any chance you could look into this. We are basically ignoring the fact that our hotfix branches don't build right now. It'd be awesome if there was a fix for this. Thanks!