git errors while building vt

[cz4rs]

Describe the bug
In recent CI builds we are getting following errors while generating git information:

-- Found Git: /usr/bin/git (found version "2.17.1") 
fatal: unsafe repository ('/vt' is owned by someone else)
To add an exception for this directory, call:

	git config --global --add safe.directory /vt
-- git invocation failed, git info cannot be obtained

[ninja][73/374] Generating vt/configs/generated/vt_git_revision.cc
-- Reading head file 
-- Using git executable at "/usr/bin/git"
-- GIT_REFSPEC: ""
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
-- could not get the git sha1
-- GIT_SHA1: ""
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
-- could not get the exact git tag
-- GIT_EXACT_TAG: ""
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
-- could not get the description
-- GIT_DESCRIPTION: ""
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
-- Git Clean Status: "DIRTY"
-- Configuring /vt/vt_git_revision.cc.in to generate /build/vt/src/vt/configs/generated/vt_git_revision.cc.

[cz4rs]

Spotted again in the documentation build:
https://github.com/DARMA-tasking/vt/actions/runs/3576844892/jobs/6015136584

[cz4rs]

Closing as this is already covered in #2024.