$ git clone -n https://src.fedoraproject.org/rpms/R-units.git /var/lib/mock/f40-build-2353045-60246/root/chroot_tmpdir/scmroot/R-units
Cloning into '/var/lib/mock/f40-build-2353045-60246/root/chroot_tmpdir/scmroot/R-units'...
$ git fetch origin bc36388b7e7fb3bc1d06e9c3f931ea841eb5d04e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-units
 * [new ref]         bc36388b7e7fb3bc1d06e9c3f931ea841eb5d04e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc36388 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild