error during build process

[jgainey]

$ git clone https://github.com/Justin-Walsh/RHEL6-Calamari.git
$ export GIT_VERSION=4.15.2
$ ./build.sh
...
error: You have local changes to 'source/Calamari.sln'; cannot switch branches.
The command '/bin/sh -c git checkout $(cat .gitversion.txt)' returned a non-zero code: 1
Error response from daemon: No such container: calamari-build
...

[jgainey]

I changed Dockerfile and it's getting further now:

< RUN git checkout $(cat .gitversion.txt)
---
> RUN git checkout -f $(cat .gitversion.txt)