$ git clone -n https://src.fedoraproject.org/rpms/R-glue.git /var/lib/mock/f38-build-side-42-init-devel-736546-27646/root/chroot_tmpdir/scmroot/R-glue
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-736546-27646/root/chroot_tmpdir/scmroot/R-glue'...
$ git fetch origin 6a753190fe48b9238c83ef7d1c17ac5261db877d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-glue
 * [new ref]         6a753190fe48b9238c83ef7d1c17ac5261db877d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a75319 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild