What are some alternatives?
When comparing git-webui and GitPrep, you can also consider the following products
Gitweb - Gitweb is a git web interface written in Perl.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
cgit - A hyperfast web frontend for git repositories written in C.
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
Gitea - A painless self-hosted Git service
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.