$ git clone -n https://src.fedoraproject.org/rpms/R-cliapp.git /var/lib/mock/f38-build-side-42-init-devel-970229-28811/root/chroot_tmpdir/scmroot/R-cliapp
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-970229-28811/root/chroot_tmpdir/scmroot/R-cliapp'...
$ git fetch origin c6ace8788194f4c164a1b9b0dd6dcf312a484c18:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-cliapp
 * [new ref]         c6ace8788194f4c164a1b9b0dd6dcf312a484c18 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c6ace87 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild