$ git clone -n https://src.fedoraproject.org/rpms/python-arm-preprocessing.git /var/lib/mock/f41-build-side-1-2905770-34716/root/chroot_tmpdir/scmroot/python-arm-preprocessing
Cloning into '/var/lib/mock/f41-build-side-1-2905770-34716/root/chroot_tmpdir/scmroot/python-arm-preprocessing'...
$ git fetch origin 3ab5a91bd09028baffb7c82be698d6ba683bce3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-arm-preprocessing
 * [new ref]         3ab5a91bd09028baffb7c82be698d6ba683bce3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ab5a91 Add test dependency manually