$ git clone -n https://src.fedoraproject.org/rpms/R-pkgconfig.git /var/lib/mock/f40-build-2175407-51067/root/chroot_tmpdir/scmroot/R-pkgconfig
Cloning into '/var/lib/mock/f40-build-2175407-51067/root/chroot_tmpdir/scmroot/R-pkgconfig'...
$ git fetch origin 16fb19e851c83d1328f0355cc3ed6f57b0e318cf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-pkgconfig
 * [new ref]         16fb19e851c83d1328f0355cc3ed6f57b0e318cf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 16fb19e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild