1: Install the development version of abapGit by cloning the repository using an online repository, or downloading the zip file and installing it using an offline repository.
2: The abapGit report installed in your system will now consist of multiple classes
3: Do the required changes to classes and/or main program
4: Create the pull request with the changes
5: After the pull request is merged, abapmerge will automatically run to build the report version of abapGit.
Every time a commit is pushed to the master branch, Travis CI will be triggered to perform the build. It will use abapmerge to merge all the includes into a single file, the build can be downloaded from https://raw.githubusercontent.com/abapGit/build/master/zabapgit.abap
Alternatively, use the GitHub webinterface to change the files and submit a pull request.