$ git clone -n https://src.fedoraproject.org/rpms/pcapdiff.git /var/lib/mock/f41-build-1045915-19070/root/chroot_tmpdir/scmroot/pcapdiff
Cloning into '/var/lib/mock/f41-build-1045915-19070/root/chroot_tmpdir/scmroot/pcapdiff'...
$ git fetch origin 338e79240b8dfd32a2dc269c6c73c40786dcca36:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pcapdiff
 * [new ref]         338e79240b8dfd32a2dc269c6c73c40786dcca36 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 338e792 Eliminate use of obsolete %patchN syntax (#2283636)