$ git clone -n https://src.fedoraproject.org/rpms/wavbreaker.git /var/lib/mock/f45-build-38243-722/root/chroot_tmpdir/scmroot/wavbreaker
Cloning into '/var/lib/mock/f45-build-38243-722/root/chroot_tmpdir/scmroot/wavbreaker'...
$ git fetch origin 471450bbd90733077c96424943cf327e3e1a5a84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wavbreaker
 * [new ref]         471450bbd90733077c96424943cf327e3e1a5a84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 471450b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild