version.py fails in git subtree

Hi,

when using gst-build and configuring meson with --wrap-mode forcefallback in a git subtree, version.py returns an error and the configuration fails:

Executing subproject x264 method meson Program version.py found: YES

Running command: /home/MAGICLEAP/aospite/gst-build-1.18/subprojects/x264/version.py --package-version
--- stdout ---
0.160.999

--- stderr ---
Warning: Could not extract versions via git rev-list or x264_config.h

subprojects/x264/meson.build:1:0: Exception: Command "/home/MAGICLEAP/aospite/gst-build-1.18/subprojects/x264/version.py --package-version" failed with status 255.

Subproject x264 is buildable: NO (disabling)

The return value is from https://gitlab.freedesktop.org/gstreamer/meson-ports/x264/-/blob/meson/version.py#L93-98

I guess this is because how is_git is set does not cover the worktree case? https://gitlab.freedesktop.org/gstreamer/meson-ports/x264/-/blob/meson/version.py#L52

Thanks, Antonio

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version.py fails in git subtree