mkrep only ever runs git init, never a commit, so a freshly created
repo has no HEAD yet. The gitea/gitlab default templates chained
`git push -u origin HEAD` unconditionally after linking the remote,
which fails immediately regardless of the remote ("src refspec HEAD
does not match any") -- reproduced by a real user hitting it on the
first mkrep --server call. Guard the push on HEAD actually resolving
to a commit; skipping it is the correct outcome (nothing to push yet),
and a real push failure once a commit exists still propagates.
mkrep can now pick a git host from --server, $GIT_SERVER, and
$GITEA_URL/$GITEA_HOST/$GITLAB_URL/$GITLAB_HOST (base URL only -- type
must come from --server/$GIT_SERVER, so setting those URL vars for an
unrelated tool can't silently turn a plain mkrep call into a
remote-creating one). Before creating anything it checks via
gh/glab/tea whether the repo already exists and links instead of
recreating it; --check-existing runs just that check and reports
without touching remotes.
rootiest