$ git clone -n https://src.fedoraproject.org/rpms/knot-resolver.git /var/lib/mock/f40-build-59095996-6571002/root/chroot_tmpdir/scmroot/knot-resolver
Cloning into '/var/lib/mock/f40-build-59095996-6571002/root/chroot_tmpdir/scmroot/knot-resolver'...
$ git fetch origin dac4a49ace4636e509cb6c956e3e9a183dc2e09c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/knot-resolver
 * [new ref]         dac4a49ace4636e509cb6c956e3e9a183dc2e09c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dac4a49 Release 5.7.5-1