$ git clone -n https://src.fedoraproject.org/rpms/emacs-flycheck.git /var/lib/mock/f40-build-2662355-66934/root/chroot_tmpdir/scmroot/emacs-flycheck
Cloning into '/var/lib/mock/f40-build-2662355-66934/root/chroot_tmpdir/scmroot/emacs-flycheck'...
$ git fetch origin 0ad9fd1c46f22edf50fab5f0f85b824c7a311735:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/emacs-flycheck
 * [new ref]         0ad9fd1c46f22edf50fab5f0f85b824c7a311735 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0ad9fd1 Update to 34.1