$ git clone -n https://src.fedoraproject.org/rpms/atomic-queue.git /var/lib/mock/f41-build-side-1-2632049-25765/root/chroot_tmpdir/scmroot/atomic-queue
Cloning into '/var/lib/mock/f41-build-side-1-2632049-25765/root/chroot_tmpdir/scmroot/atomic-queue'...
$ git fetch origin f56baf294a322cc9e3ff16f9737a4954e98c3ce7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/atomic-queue
 * [new ref]         f56baf294a322cc9e3ff16f9737a4954e98c3ce7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f56baf2 Update to 1.6.4 (close RHBZ#2299261)