$ git clone -n https://src.fedoraproject.org/rpms/python-xarray.git /var/lib/mock/f38-build-side-42-init-devel-1062944-29772/root/chroot_tmpdir/scmroot/python-xarray
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1062944-29772/root/chroot_tmpdir/scmroot/python-xarray'...
$ git fetch origin 099f6f89e8055458ef688eb69c9eaec8e45c9b07:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-xarray
 * [new ref]         099f6f89e8055458ef688eb69c9eaec8e45c9b07 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 099f6f8 Fix sources