Cannot build GIMP from the Gitlab's git repository

GIMP version: 2.99 Development Branch

Operating System: Linux, Ubuntu 20.04 LTS Focal Fossa

Package: GIMP source from https://gitlab.gnome.org/GNOME/gimp

Description of the bug

In short, I can't build GIMP from the Gitlab's git repository because of "Error: missing dependency gegl-0.4 >= 0.4.23" BUT as it turns out, the latest version of gegl-0.4 is 0.4.22, so autogen.sh is asking for a future version that does NOT exist yet.

Reproduction

Is the bug reproducible? Always

To prove that the version gegl 0.4.23 does not exist yet, check this two places: the Gegl repository here on Gitlab https://gitlab.gnome.org/GNOME/gegl/-/tags see the last tag it's from version 0.4.22. The other place is https://download.gimp.org/pub/gegl/0.4/ see the latest version of Gegl, it's also 0.4.22, there is no version 0.4.23 so this impedes the build of GIMP with Gegl

Reproduction steps:

Following the tutorial at: https://www.gimp.org/source/howtos/gimp-git-build.html Execute:

git clone https://gitlab.gnome.org/GNOME/gimp.git
cd gimp
./autogen.sh --prefix=$PREFIX 3a. the $PREFIX part is not absolutely required to reproduce to bug, simply executing ./autogen.sh gives the same error.

Expected result:

GIMP is correctly configured using the script autogen.sh

Actual result:

GIMP can't be configured, and therefore can't be built