When Compiling Qt from source configure fails to pick up correct version number

When I configure and compile qt from source the configure script doesn't correctly pick up the qt version. Specifically I am targeting 6.4.2. I have tried checking our branch 6.4.2 and checking out tag v6.4.2 and after configuration both show up version 6.10.0.

Checking config
```
$ grep QT_VERSION_STR qtbase/src/corelib/global/qconfig.h
#define QT_VERSION_STR "6.10.0"
```
after compiling I end up with 6.10.0 as suggested by define.

Steps to reproduce:

Clone Repro
```
$ git clone git@github.com:qt/qt5.git
```
init repro

```
$ cd qt5
$ ./init-repository -f --module-subset=qtbase,qtwayland,qtdeclarative,qtimageformats,qtlanguageserver,qtshadertools,qtsvg```
I have tried checking out both branch and tag to the same result
```
$ git checkout 6.4.2
```
or
```
$ git checkout v6.4.2
$ git describe --tags
v6.4.2
```
now back into build folder
```
$ cd ../qt-hostbuild
```
configure
```

cmake ../qt5/ -GNinja -DCMAKE_BUILD_TYPE=Release -DQT_BUILD_EXAMPLES=OFF -DQT_BUILD_TESTS=OFF -DCMAKE_INSTALL_PREFIX=$QTBUILDROOT/qt-host/ -DQT_FEATURE_xlib=OFF -DFEATURE_xcb=OFF -DQT_FEATURE_xkbcommon_x11=OFF -DQT_FEATURE_opensslv11=ON -DQT_FEATURE_accessibility_atspi_bridge=OFF -DBUILD_qtwayland=ON -DFEATURE_wayland_client=ON -DFEATURE_wayland_server=OFF -DQT_FEATURE_kms=ON -DQT_FEATURE_opengles2=ON```
check config
```
$ grep QT_VERSION_STR qtbase/src/corelib/global/qconfig.h
#define QT_VERSION_STR "6.10.0"
```