Enable tag deployment

[EricvanSchaik]

git describe --exact does not work for some reason, directly taking the tag seems to work better. My hypothesis would be that normally the release branches are used instead of releasing old tags. If releasing old tags is very common, it could be an error on my machine, in that case don't approve

[baszoetekouw]

Ik kan het nieuw zo goed beoordelen. Als het werkt lijkt het me prima :)
Ter referentie, in opencoenxt-deploy doen we dit:

# What is our git situation?
get_git_tag() {
    local result
    if ! result=$(git describe --tags 2> /dev/null); then
        result="no tags found"
    fi
    echo "$result"
}
get_git_branch() {
    local result
    if ! result=$(git branch --show-current 2> /dev/null); then
        result="no branch found"
    fi
    echo "$result"
}