Git
Git is a very powerful version control system which is very popular (and it is also used for all our software repositories). You are expected to know about Git and to be able to work with it. If you don't know how to push, pull, rebase and configure Git, you should have a look at the given links below and learn about Git.
It is recommended to use a visualization tool as it eases your workflow and gives you direct insight into the state of a repository and the status of all the branches. There are two different tools which are recommended to use:
1: gitk
In general, you can install it via your package manager, for example:
sudo apt-get install gitk
For more information see gitk.
2: tig
In general, you can install it via your package manager, for example:
sudo apt-get install tig
For more information see tig.

Suggested workflow

Basic GIT workflow in our repositories

Checkout your development branch in the given repository
git checkout UserBranch
make your changes to the macros and/or add new files (i.e. ExtractSignalBinning.h)
git add ExtractSignalBinning.h
Write a commit message and make the commit itself via:
git commit -m "Changed binning for some energy"
Checkout the master branch and rebase to the latest version
git checkout master
git pull --rebase
Checkout your branch again and rebase it to the latest master version
git checkout UserBranch
git rebase master
If everything works with the rebase, then push the changes.
git push origin UserDevel
Afterwards, a merge request can be made on the git repositories website.

Useful Links