$ git clone -n https://src.fedoraproject.org/rpms/haruna.git /var/lib/mock/f42-build-3403047-45134/root/chroot_tmpdir/scmroot/haruna
Cloning into '/var/lib/mock/f42-build-3403047-45134/root/chroot_tmpdir/scmroot/haruna'...
$ git fetch origin 81ca8605cb5b72f67e0e02dee326eaed0538239c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/haruna
 * [new ref]         81ca8605cb5b72f67e0e02dee326eaed0538239c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 81ca860 version 1.3.3