A change ID is stable over time as you tweak the message of the change or the files edited by the change. Each of these changes become a new immutable git commit under the hood.
The fact that change ID is stable is very convenient for humans - means you have something explicit to hold on to as everything else may change over time.
The fact that change ID is stable is very convenient for humans - means you have something explicit to hold on to as everything else may change over time.