$ git clone -n https://src.fedoraproject.org/rpms/ghc-atomic-write.git /var/lib/mock/f41-build-side-1-2672275-29195/root/chroot_tmpdir/scmroot/ghc-atomic-write
Cloning into '/var/lib/mock/f41-build-side-1-2672275-29195/root/chroot_tmpdir/scmroot/ghc-atomic-write'...
$ git fetch origin 14522c11735d1fa19fe1ec47d3d85dbb291e3f15:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-atomic-write
 * [new ref]         14522c11735d1fa19fe1ec47d3d85dbb291e3f15 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 14522c1 bump release