$ git clone -n https://src.fedoraproject.org/rpms/R-geepack.git /var/lib/mock/f38-build-side-42-init-devel-992066-29120/root/chroot_tmpdir/scmroot/R-geepack
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-992066-29120/root/chroot_tmpdir/scmroot/R-geepack'...
$ git fetch origin 51248cecbf64aa19d90f8b10e3c27479a985fede:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-geepack
 * [new ref]         51248cecbf64aa19d90f8b10e3c27479a985fede -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 51248ce Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild