One of the strength of git is the way it handles branches.
Let’s start with 1 commit on master.
and let’s create a branch named feature-1:
$ git branch feature-1
Git is very fast at creating branches because it is only about creating a pointer:
HEAD is a symbolic ref to the branch your working tree is on and is still pointing to master.
If we switch to our new branch, git simply changes the HEAD reference
$ git checkout feature-1
Switched to branch 'feature-1'
If we create a file while on that branch and commit it, we then have:
If we switch to master:
$ git checkout master
Switched to branch 'master'
The HEAD reference is switched again, and our working directories is updated accordingly.
As expected, if we create a new commit on master, we land on that configuration:
