$ git clone -n https://src.fedoraproject.org/rpms/python-xarray.git /var/lib/mock/f41-build-side-2-python-2707310-30434/root/chroot_tmpdir/scmroot/python-xarray
Cloning into '/var/lib/mock/f41-build-side-2-python-2707310-30434/root/chroot_tmpdir/scmroot/python-xarray'...
$ git fetch origin b4a8abb2fccab748359b56efa0ccbcf9e85fc6c2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-xarray
 * [new ref]         b4a8abb2fccab748359b56efa0ccbcf9e85fc6c2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b4a8abb Fix tests on big-endian systems