$ git clone -n https://src.fedoraproject.org/rpms/perl-IO-Stty.git /var/lib/mock/f41-build-766320-13472/root/chroot_tmpdir/scmroot/perl-IO-Stty
Cloning into '/var/lib/mock/f41-build-766320-13472/root/chroot_tmpdir/scmroot/perl-IO-Stty'...
$ git fetch origin 2bf89b4d9498d37b8c921d0a8eb6190e0ced63ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IO-Stty
 * [new ref]         2bf89b4d9498d37b8c921d0a8eb6190e0ced63ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2bf89b4 Eliminate use of obsolete %patchN syntax (#2283636)