$ git clone -n https://src.fedoraproject.org/rpms/objfw.git /var/lib/mock/f38-build-side-42-init-devel-1416532-31456/root/chroot_tmpdir/scmroot/objfw
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1416532-31456/root/chroot_tmpdir/scmroot/objfw'...
$ git fetch origin 99d68f540c529c6212f657d08e2ead7de991e4cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/objfw
 * [new ref]         99d68f540c529c6212f657d08e2ead7de991e4cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 99d68f5 Update to 1.0.4