$ git clone -n https://src.fedoraproject.org/rpms/pykka.git /var/lib/mock/f39-build-1597801-38464/root/chroot_tmpdir/scmroot/pykka
Cloning into '/var/lib/mock/f39-build-1597801-38464/root/chroot_tmpdir/scmroot/pykka'...
$ git fetch origin c36cada4c6b996d75ae8bfb5d93ed485a09bd298:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pykka
 * [new ref]         c36cada4c6b996d75ae8bfb5d93ed485a09bd298 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c36cada fix changelog entry