Populate guest /root/.gitconfig from host git config --global during work-disk preparation so plain VM shells can commit.
Resolve user.name and user.email from the source repo for vm run and write them only into the imported checkout, preserving repo-specific identity overrides.
Update mounted guest .gitconfig through a host temp file plus sudo install instead of direct git config --file writes, since the mounted root-owned work disk blocks Git lockfile creation.
Validated with GOCACHE=/tmp/banger-gocache go test ./..., make build, and a live alpine vm create smoke check for guest git config.
Thales Maciel
42b4a18c63