$ git clone -n https://src.fedoraproject.org/rpms/R-biglm.git /var/lib/mock/f38-build-side-42-init-devel-584915-26107/root/chroot_tmpdir/scmroot/R-biglm
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-584915-26107/root/chroot_tmpdir/scmroot/R-biglm'...
$ git fetch origin d9eae69dc0877973e6ef26ff553588a66b2bd2b8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-biglm
 * [new ref]         d9eae69dc0877973e6ef26ff553588a66b2bd2b8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d9eae69 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild