$ git clone -n https://src.fedoraproject.org/rpms/pipenightdreams.git /var/lib/mock/f41-build-889674-16837/root/chroot_tmpdir/scmroot/pipenightdreams
Cloning into '/var/lib/mock/f41-build-889674-16837/root/chroot_tmpdir/scmroot/pipenightdreams'...
$ git fetch origin 1bc7d31143dc1fd9cfe8f762cce5de4928cce233:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pipenightdreams
 * [new ref]         1bc7d31143dc1fd9cfe8f762cce5de4928cce233 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1bc7d31 Eliminate use of obsolete %patchN syntax (#2283636)