$ git clone -n https://src.fedoraproject.org/rpms/pcapdiff.git /var/lib/mock/f45-build-21449-584/root/chroot_tmpdir/scmroot/pcapdiff
Cloning into '/var/lib/mock/f45-build-21449-584/root/chroot_tmpdir/scmroot/pcapdiff'...
$ git fetch origin e7c52d6413e1d7a5cde6cce9e5fad8d3e68bff5b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pcapdiff
 * [new ref]         e7c52d6413e1d7a5cde6cce9e5fad8d3e68bff5b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e7c52d6 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild