$ git clone -n https://src.fedoraproject.org/rpms/qt5-qtspeech.git /var/lib/mock/f41-build-side-1-3135915-39768/root/chroot_tmpdir/scmroot/qt5-qtspeech
Cloning into '/var/lib/mock/f41-build-side-1-3135915-39768/root/chroot_tmpdir/scmroot/qt5-qtspeech'...
$ git fetch origin cb9988bb5de6820d4752876d6c04b47198b30194:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qt5-qtspeech
 * [new ref]         cb9988bb5de6820d4752876d6c04b47198b30194 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb9988b 5.15.15