$ git clone -n https://src.fedoraproject.org/rpms/R-Cairo.git /var/lib/mock/f39-build-1495953-34546/root/chroot_tmpdir/scmroot/R-Cairo
Cloning into '/var/lib/mock/f39-build-1495953-34546/root/chroot_tmpdir/scmroot/R-Cairo'...
$ git fetch origin 47aa586716f751ee8b714174aa985e3f31ce50f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-Cairo
 * [new ref]         47aa586716f751ee8b714174aa985e3f31ce50f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 47aa586 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild