It seems that eGit is the preferred way to use git within eclipse. So I've followed all the help links and wiki pages, and found a ton of long explanations on how to use git. What I can't find is where is this mythical egit? and how to I install it?
Yes, the Marketplace makes installing plugins a lot easier than what it used to be. I'm always miffed when I have to use an older version of Eclipse* that doesn't have the Marketplace because I have to look up the URLs for the plugins I need.
* A 3rd-party tool we use at work is based on an older Eclipse version.
You first have to get the project registered in git. Right-click the project and select Team > Share and then choose git for the menu. From that point on, if you right click the project or a file in the project, there will be a Team menu item that provides the git options for the project.
You can probably also import an existing git project into Eclipse by doing File > Import > Git and then going thru the import wizard (this is a guess on my part, it works this way for Subversion but I've never done this with git).