$ git clone -n https://src.fedoraproject.org/rpms/stress-ng.git /var/lib/mock/f38-build-728446-101241/root/chroot_tmpdir/scmroot/stress-ng
Cloning into '/var/lib/mock/f38-build-728446-101241/root/chroot_tmpdir/scmroot/stress-ng'...
$ git fetch origin 9f3f758711de309a8633343f2ecb2e3bc4ccb7a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stress-ng
 * [new ref]         9f3f758711de309a8633343f2ecb2e3bc4ccb7a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9f3f758 Patch to remove DARN