$ git clone -n https://src.fedoraproject.org/rpms/R-winch.git /var/lib/mock/f38-build-side-42-init-devel-920781-28734/root/chroot_tmpdir/scmroot/R-winch
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-920781-28734/root/chroot_tmpdir/scmroot/R-winch'...
$ git fetch origin 34f6f18515b61b6d8c0b4978d33283ff0145abad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-winch
 * [new ref]         34f6f18515b61b6d8c0b4978d33283ff0145abad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 34f6f18 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild