$ git clone -n https://src.fedoraproject.org/rpms/pychromecast.git /var/lib/mock/f41-build-756818-13422/root/chroot_tmpdir/scmroot/pychromecast
Cloning into '/var/lib/mock/f41-build-756818-13422/root/chroot_tmpdir/scmroot/pychromecast'...
$ git fetch origin 26a15bce42582c6346ece757a272cd17756a6093:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pychromecast
 * [new ref]         26a15bce42582c6346ece757a272cd17756a6093 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26a15bc Update to newer python build macros