v3.26.3

• improved: performance of listing commits for red-edge branches on large repos
• improved: message in case of missing .git/machete file suggests to use git machete git{hub,lab} checkout-{prs,mrs}
• fixed: pass -c log.showSignature=false to all git invocations to hide GPG signatures in logs; if log.showSignature were set to a value equivalent to true in a user's git configuration, the GPG signatures shown in logs would cause errors in git log and git reflog parsing internal to git machete (reported and contributed by @goxberry)