This how to is under development but it might help. Feel free to contribute.
ChangeLog, NEWS.README, AUTHORS, THANKS, TODO (when present).configure.in.in or configure.ac.in.<package>_version_major, <package>_version_minor and <package>_version_micro) to the version you want to release.git from <package>_version_tag../autogen.sh.make distcheckINSTALL, COPYINGgit tag -a <package>-<version> git push git push --tags
You can sign tags with a GPG key by adding an additional parameter to the git tag command. For more information about tagging read the git-tag manual.
configure.in.in or configure.ac.in.<package>_version_tag to git.