$ git clone -n https://src.fedoraproject.org/rpms/R-ggplot2.git /var/lib/mock/f38-build-side-42-init-devel-1045189-29761/root/chroot_tmpdir/scmroot/R-ggplot2
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1045189-29761/root/chroot_tmpdir/scmroot/R-ggplot2'...
$ git fetch origin 4c55fac12c410d28422f96654b79b22e7a49aeac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-ggplot2
 * [new ref]         4c55fac12c410d28422f96654b79b22e7a49aeac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4c55fac Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild