Git tag operations

gistfile1.txt

# fetch remote tags:
$ git fetch --tags origin

# list all remote tags:
$ git ls-remote --tags

# list all major version tags:
$ git ls-remote --tags | grep -oe "refs/tags[^\^]*" | uniq | grep -E "v2[0-9][0-9][0-9]-[0-9][0-9]$"

# delete all non-version tags:
$ git ls-remote --tags | grep -oe "refs/tags[^\^]*" | uniq | grep -vE "v2[0-9][0-9][0-9]-[0-9][0-9]" | xargs git push --delete origin

# delete all RCs:
$ git ls-remote --tags | grep -oe "refs/tags[^\^]*" | uniq | grep -E "v[0-9][0-9][0-9][0-9]-[0-9][0-9].*rc[0-9][0-9]$" | xargs git push --delete origin

# only keep tags locally that are remote:
$ git tag -l | xargs git tag -d && git fetch --tags