$ git clone -n https://src.fedoraproject.org/rpms/knot-resolver.git /var/lib/mock/f39-build-2449588-61041/root/chroot_tmpdir/scmroot/knot-resolver
Cloning into '/var/lib/mock/f39-build-2449588-61041/root/chroot_tmpdir/scmroot/knot-resolver'...
$ git fetch origin d60088e2695d39e8a00d0253794e20783d2f063b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/knot-resolver
 * [new ref]         d60088e2695d39e8a00d0253794e20783d2f063b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d60088e Release 5.7.1-1