handle git

env GIT_AUTHOR_NAME='Bryan C. Mills'
env GIT_AUTHOR_EMAIL='bcmills@google.com'
env GIT_COMMITTER_NAME=$GIT_AUTHOR_NAME
env GIT_COMMITTER_EMAIL=$GIT_AUTHOR_EMAIL

git init

at 2019-10-07T14:15:32-04:00
git add go.mod
git commit -m 'add go.mod file without go source files'
git branch -m master
git tag v2.0.0

git log --oneline --decorate=short
cmp stdout .git-log

-- .git-log --
122733c (HEAD -> master, tag: v2.0.0) add go.mod file without go source files
-- go.mod --
module vcs-test.golang.org/git/empty-v2-without-v1.git/v2

go 1.14