Following infos are available (click on info for the URL):

Info Current value Description
stable 2.3 Stable version.
stable_number 33751040 (0x02030000) Stable version, as number, like plugin API: info_get("version_number").
stable_date 2018-10-21 Date of stable version (format: "YYYY-MM-DD").
devel 2.4-dev Development version.
git 7e0da4b68a9681d5bdf02461f6638ba8e7c267fe Output of "git rev-parse HEAD" for sources repository.
git_scripts 0e80e2a37df2674cbfbe8b58b146f156b8134593 Output of "git rev-parse HEAD" for scripts repository.
next_stable 2.4 Next stable version.
next_stable_number 33816576 (0x02040000) Next stable version, as number, like plugin API: info_get("version_number").
next_stable_date 2019-02-10 Approximate date of next stable version (format: "YYYY-MM-DD").
release_signing_fingerprint A9AB5AB778FA5C3522FD0378F82F4B16DEC408F8 Release signing key fingerprint (format: PGP fingerprint).
release_signing_key (binary data) Release signing key (format: PGP public key).
debian_repository_signing_fingerprint 11E9DE8848F2B65222AA75B8D1820DB22A11534E Debian/Ubuntu repository signing key fingerprint (format: PGP fingerprint).
debian_repository_signing_key (binary data) Debian/Ubuntu repository signing key (format: PGP public key).
all stable:2.3
stable_number:33751040
stable_date:2018-10-21
devel:2.4-dev
git:7e0da4b68a9681d5bdf02461f6638ba8e7c267fe
git_scripts:0e80e2a37df2674cbfbe8b58b146f156b8134593
next_stable:2.4
next_stable_number:33816576
next_stable_date:2019-02-10
release_signing_fingerprint:A9AB5AB778FA5C3522FD0378F82F4B16DEC408F8
debian_repository_signing_fingerprint:11E9DE8848F2B65222AA75B8D1820DB22A11534E
All non-binary infos (one info by line, format: "info:value").

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