Currently releases are mirrored to the locations documented on the mirror status page.
More mirrors are certainly welcome. Jenkins is mirrored by the Oregon State University Open Source Lab (OSUOSL) and by servers hosted by donors in the United States, Europe, China, and Japan. Worldwide mirrors reduce the load on individual servers, spread the bandwidth costs among multiple servers, and improve download performance for users.
If you’re interested in running a public mirror, drop an email to jenkins-infra@googlegroups.com and we can discuss space and bandwidth requirements.
Mirrors on the Indian subcontinent, in South America, and in Africa would be great additions to the Jenkins mirrors.