I guess you name this CLONE_HOME due to "git clone".

However, take into account that this script could not be executed from a proper git repository, e.g. when it is used in a "archived" source directory (such as the ones in https://github.com/telefonicaid/fiware-orion/releases), a RPM, etc.

Thus, I would suggest to name this SRC_HOME, SRC_ROOT or something like that.