$ git clone -n https://src.fedoraproject.org/rpms/knot-resolver.git /var/lib/mock/f40-build-769541-125682/root/chroot_tmpdir/scmroot/knot-resolver
Cloning into '/var/lib/mock/f40-build-769541-125682/root/chroot_tmpdir/scmroot/knot-resolver'...
$ git fetch origin f05d71748e4997d5d54377907920ae9c6c02db11:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/knot-resolver
 * [new ref]         f05d71748e4997d5d54377907920ae9c6c02db11 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f05d717 Release 5.7.0-3