$ git clone -n https://src.fedoraproject.org/rpms/shake.git /var/lib/mock/f41-build-side-1-2949455-35472/root/chroot_tmpdir/scmroot/shake
Cloning into '/var/lib/mock/f41-build-side-1-2949455-35472/root/chroot_tmpdir/scmroot/shake'...
$ git fetch origin d03623c940088997fd2d43984cdf1ec514911cf2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/shake
 * [new ref]         d03623c940088997fd2d43984cdf1ec514911cf2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d03623c update to 0.19.8