PowerShell with $ErrorActionPreference = 'Stop' treats ANY stderr
output from native commands as a terminating NativeCommandError —
even successful git operations that write progress to stderr
(e.g. 'Cloning into ...').
Fix: temporarily set $ErrorActionPreference = 'Continue' around all
git commands (clone, fetch, checkout, pull, submodule update). This
lets git run normally while preserving strict error handling for
the rest of the installer.
cdf5375b9a