$ git clone -n https://src.fedoraproject.org/rpms/R-winch.git /var/lib/mock/f40-build-2270258-54800/root/chroot_tmpdir/scmroot/R-winch
Cloning into '/var/lib/mock/f40-build-2270258-54800/root/chroot_tmpdir/scmroot/R-winch'...
$ git fetch origin 8ecc3f4f94d65a1365b75dd871c618393f4e12fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-winch
 * [new ref]         8ecc3f4f94d65a1365b75dd871c618393f4e12fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ecc3f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild