$ git clone -n https://src.fedoraproject.org/rpms/python-niaarm.git /var/lib/mock/f41-build-side-2-python-2738120-30844/root/chroot_tmpdir/scmroot/python-niaarm
Cloning into '/var/lib/mock/f41-build-side-2-python-2738120-30844/root/chroot_tmpdir/scmroot/python-niaarm'...
$ git fetch origin 2381954268406711e8c3a2365c7b742187931f37:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-niaarm
 * [new ref]         2381954268406711e8c3a2365c7b742187931f37 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2381954 Update to 0.3.12