go build -o ct-bin ./ct/main.go
          ./ct-bin doc-gen

$ git status
HEAD detached at b817f07
nothing to commit, working tree clean
$ git branch
* (HEAD detached at b817f07)
$ git fetch origin
$ ct lint --config charttesting-conf.yaml
Linting charts...
>>> helm version --template {{ .Version }}
>>> git rev-parse --is-inside-work-tree
>>> git rev-parse --verify main
------------------------------------------------------------------------------------------------------------------------
No chart changes detected.
------------------------------------------------------------------------------------------------------------------------
failed linting charts: failed identifying charts to process: targetBranch 'main' does not exist
Error: failed linting charts: failed identifying charts to process: targetBranch 'main' does not exist
Cleaning up project directory and file based variables
00:01
ERROR: Job failed: exit code 1

$ git status
HEAD detached at d05b9db
nothing to commit, working tree clean
$ git branch
* (HEAD detached at d05b9db)
$ git fetch origin
$ ct lint --config charttesting-conf.yaml
Linting charts...
>>> helm version --template {{ .Version }}
>>> git rev-parse --is-inside-work-tree
>>> git merge-base origin/main HEAD
>>> git diff --find-renames --name-only 43bcf6ea0e66b[26]...
------------------------------------------------------------------------------------------------------------------------
No chart changes detected.
------------------------------------------------------------------------------------------------------------------------
All charts linted successfully
Cleaning up project directory and file based variables
00:01
Job succeeded