$ git clone -n https://src.fedoraproject.org/rpms/R-memoise.git /var/lib/mock/f38-build-side-42-init-devel-575485-26000/root/chroot_tmpdir/scmroot/R-memoise
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-575485-26000/root/chroot_tmpdir/scmroot/R-memoise'...
$ git fetch origin 4f5b878e87d573b05e3b2844061f8f7cb84d4da9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-memoise
 * [new ref]         4f5b878e87d573b05e3b2844061f8f7cb84d4da9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4f5b878 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild