Deleting git tags?

[Roland McGrath]

> Snapshot tags are used to mark releases being delivered to the
> translation team. Snapshot tags are of the form {{{glibc-X.Y.Z.DATE}}}
> where {{{DATE}}} is {{{YYYYMMDD}}} e.g. {{{20120626}}}. Snapshots of
> trunk always start with {{{90}}} for the value of {{{Z}}} e.g.
> {{{glibc-2.15.90.20120626}}}.

I think these should be non-signed, non-annotated tags so they don't
interfere with 'git describe'.