$ git clone -n https://src.fedoraproject.org/rpms/pyxdg.git /var/lib/mock/f45-build-33868-674/root/chroot_tmpdir/scmroot/pyxdg
Cloning into '/var/lib/mock/f45-build-33868-674/root/chroot_tmpdir/scmroot/pyxdg'...
$ git fetch origin bff284a91d121c019b0ed9be3fb36537d0d4e146:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pyxdg
 * [new ref]         bff284a91d121c019b0ed9be3fb36537d0d4e146 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bff284a 0.28