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• repository – a directory, that contains Git database and metadata.
• commit – a Git object, that contains containing a pointer to a data snapshot in Git database. Essentially, the commit is a hash-named file in Git database, that contains a reference to a tree object, representing a data snapshot in timefile tree snapshot along with author and date information. Commit is identified by its SHA1 hash value.
• branch – a reference to certain commit; a file in a Git database that contains a hash of a certain commit, thus referencing that particular commit.
• master branch – a default branch called master that's being created along with new repository. By agreement, it represents the main line of development, but technically it's just another branch.
• tag – like a branch, a reference to a commit - a file in a Git database that contains a hash of that particular commit. Git supports two kinds of *tags*: *lightweight* and *annotated*; SubGit supports only *lightweight tags*.

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All the mapping configuration assembled in SubGit configuration file. The configuration file is being created at the SVN-to-Git translation beginning by SubGit's configure subcommand. The file , that is situated in subgit subdirectory inside a newly created Git repository:

/GIT_REPOS_PATH
    …
    /subgit
       …
       /subgit/config

Here is an example of how the [svn] of the configuration file may look like:

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