Juju snap doesn't have git binary - "git" version string generation failed : exec: "git": executable file not found in $PATH

$ juju version
3.1.6-genericlinux-amd64

I tried to test a patch for a charm by using a local charm on the filesystem, then Juju failed to generate version string for the local charm as follows.

$ juju refresh openstack-dashboard --path .
WARNING trying to generate version string: "git" version string generation failed : exec: "git": executable file not found in $PATH
This means that the charm version won't show in juju status. Charm path "/home/ubuntu/charm-openstack-dashboard"
Added local charm "openstack-dashboard", revision 32, to the model
no change to endpoints in space "alpha": application-dashboard, certificates, cluster, dashboard, dashboard-plugin, ha, identity-service, nrpe-external-master, public, shared-db, website, websso-fid-service-provider, websso-trusted-dashboard

Even though there is a git binary on the host filesystem, Juju snap itself doesn't have it.

$ snap run --shell juju -- git --help
/bin/bash: git: No such file or directory