rails_admin

https://github.com/railsadminteam/rails_admin

Ruby

RailsAdmin is a Rails engine that provides an easy-to-use interface for managing your data

Gitlab::Git::Ref#target

Target sha.
Usually it is commit sha but in case
when tag reference on other tag it can be tag sha

Source | Google | Stack overflow

Edit

git clone [email protected]:railsadminteam/rails_admin.git
cd rails_admin
open

Contribute

# Make a new branch
git checkout -b -your-name--update-docs-Gitlab--Git--Ref-target-for-pr

# Commit to git
git add git commit -m "better docs for Gitlab::Git::Ref#target"

# Open pull request
gem install hub # on a mac you can `brew install hub`
hub fork
git push <your name> -your-name--update-docs-Gitlab--Git--Ref-target-for-pr
hub pull-request

# Celebrate!