$ git clone -n https://src.fedoraproject.org/rpms/iftop.git /var/lib/mock/f45-build-14040-456/root/chroot_tmpdir/scmroot/iftop
Cloning into '/var/lib/mock/f45-build-14040-456/root/chroot_tmpdir/scmroot/iftop'...
$ git fetch origin a17467e851070fd59c22b7466bb97135dcfd0455:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/iftop
 * [new ref]         a17467e851070fd59c22b7466bb97135dcfd0455 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a17467e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild