handle git

env GIT_AUTHOR_NAME='Russ Cox'
env GIT_AUTHOR_EMAIL='rsc@golang.org'
env GIT_COMMITTER_NAME=$GIT_AUTHOR_NAME
env GIT_COMMITTER_EMAIL=$GIT_AUTHOR_EMAIL

git init

at 2018-04-25T11:00:57-04:00
git add go.mod new.go p1 p2
git commit -m 'initial commit'
git branch -m master

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

-- .git-log --
36cc50a (HEAD -> master) initial commit
-- go.mod --
module "vcs-test.golang.org/git/modlegacy1-new.git/v2"
-- new.go --
package new

import _ "vcs-test.golang.org/git/modlegacy1-new.git/v2/p2"
-- p1/p1.go --
package p1

import _ "vcs-test.golang.org/git/modlegacy1-old.git/p2"
import _ "vcs-test.golang.org/git/modlegacy1-new.git"
import _ "vcs-test.golang.org/git/modlegacy1-new.git/p2"
-- p2/p2.go --
package p2
