$ git clone -n https://src.fedoraproject.org/rpms/waffle.git /var/lib/mock/f45-build-38233-722/root/chroot_tmpdir/scmroot/waffle
Cloning into '/var/lib/mock/f45-build-38233-722/root/chroot_tmpdir/scmroot/waffle'...
$ git fetch origin c4a53b3bed1b290ccb6507b698d2e8ce24ca0de5:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/waffle
 * [new ref]         c4a53b3bed1b290ccb6507b698d2e8ce24ca0de5 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4a53b3 remove noarch tag from doc sub-package