$ git clone -n https://src.fedoraproject.org/rpms/pychromecast.git /var/lib/mock/f45-build-53665-928/root/chroot_tmpdir/scmroot/pychromecast
Cloning into '/var/lib/mock/f45-build-53665-928/root/chroot_tmpdir/scmroot/pychromecast'...
$ git fetch origin a79b54ebe29262316f2f3f9c8072feb105582133:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pychromecast
 * [new ref]         a79b54ebe29262316f2f3f9c8072feb105582133 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a79b54e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild