Git tips

$ git config --global credential.helper store 

$ git config credential.helper cache <timeout>

$ git rev-list --count <revision>

$ git rev-list --count branch-1
$ git rev-list --count 3930540717b

read old new ref
author=$(git log -1 $ref --pretty=%an)
committer=$(git log -1 $ref --pretty=%cn)
echo author:$author
echo committer:$committer

  fifty_first_commits = list(repo.iter_commits('master', max_count=50))
        assert len(fifty_first_commits) == 50
        # this will return commits 21-30 from the commit list as traversed backwards master
        ten_commits_past_twenty = list(repo.iter_commits('master', max_count=10, skip=20))
        assert len(ten_commits_past_twenty) == 10
        assert fifty_first_commits[20:30] == ten_commits_past_twenty