$ git clone -n https://src.fedoraproject.org/rpms/knot-resolver.git /var/lib/mock/f41-build-738771-13297/root/chroot_tmpdir/scmroot/knot-resolver
Cloning into '/var/lib/mock/f41-build-738771-13297/root/chroot_tmpdir/scmroot/knot-resolver'...
$ git fetch origin 889658ebd928086f9da60182c59be1c2c4199da3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/knot-resolver
 * [new ref]         889658ebd928086f9da60182c59be1c2c4199da3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 889658e Release 5.7.2-1