$ git clone -n https://src.fedoraproject.org/rpms/R-ggplot2.git /var/lib/mock/f40-build-2304647-57034/root/chroot_tmpdir/scmroot/R-ggplot2
Cloning into '/var/lib/mock/f40-build-2304647-57034/root/chroot_tmpdir/scmroot/R-ggplot2'...
$ git fetch origin 0274f525fd2a5087c90a0b1555fa1c666e3d98f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-ggplot2
 * [new ref]         0274f525fd2a5087c90a0b1555fa1c666e3d98f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0274f52 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild