$ git clone -n https://src.fedoraproject.org/rpms/python-mwclient.git /var/lib/mock/f45-build-31617-654/root/chroot_tmpdir/scmroot/python-mwclient
Cloning into '/var/lib/mock/f45-build-31617-654/root/chroot_tmpdir/scmroot/python-mwclient'...
$ git fetch origin 53b4bc3555cac4cf0c673b863693df638be1ca9d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mwclient
 * [new ref]         53b4bc3555cac4cf0c673b863693df638be1ca9d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53b4bc3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild