You can rename you repository at any time. For example, if you have
finished development, you may want to change the repository name from
website-dev to website to avoid confusion. Go to
Websites&Domains > Git, click Repository Settings, and enter
new name at the Repository name field.
If you want to remove the repository, click the Remove Repository
link on the Git screen. In this case, Plesk will remove just the
repository; the target directory with the published data will remain as
it is.