$ git clone -n https://src.fedoraproject.org/rpms/stress-ng.git /var/lib/mock/f40-build-1443534-23577/root/chroot_tmpdir/scmroot/stress-ng
Cloning into '/var/lib/mock/f40-build-1443534-23577/root/chroot_tmpdir/scmroot/stress-ng'...
$ git fetch origin 5e17bdae7503315e6e4d7f2a113a11bd95b04343:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/stress-ng
 * [new ref]         5e17bdae7503315e6e4d7f2a113a11bd95b04343 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e17bda Update to 0.17.05, fixes rhbz#2257061