$ git clone -n https://src.fedoraproject.org/rpms/knot-resolver.git /var/lib/mock/f42-build-3272976-41309/root/chroot_tmpdir/scmroot/knot-resolver
Cloning into '/var/lib/mock/f42-build-3272976-41309/root/chroot_tmpdir/scmroot/knot-resolver'...
$ git fetch origin 4b0a4b0b31406bc1d7e7938652374e0e3c9ccc50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/knot-resolver
 * [new ref]         4b0a4b0b31406bc1d7e7938652374e0e3c9ccc50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b0a4b0 Add sysusers.d config file to allow rpm to create users/groups automatically