$ git clone -n https://src.fedoraproject.org/rpms/dhcpdump.git /var/lib/mock/f45-build-7477-364/root/chroot_tmpdir/scmroot/dhcpdump
Cloning into '/var/lib/mock/f45-build-7477-364/root/chroot_tmpdir/scmroot/dhcpdump'...
$ git fetch origin 9652e38a5ff4f34825ef6ffd619ca2a0f951118f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dhcpdump
 * [new ref]         9652e38a5ff4f34825ef6ffd619ca2a0f951118f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9652e38 Update sha