$ git clone -n https://src.fedoraproject.org/rpms/unpaper.git /var/lib/mock/f40-build-804480-144539/root/chroot_tmpdir/scmroot/unpaper
Cloning into '/var/lib/mock/f40-build-804480-144539/root/chroot_tmpdir/scmroot/unpaper'...
$ git fetch origin 8f726eedd3c0cdff3d6244f296196fd6e5148a7a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unpaper
 * [new ref]         8f726eedd3c0cdff3d6244f296196fd6e5148a7a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8f726ee Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild