$ git clone -n https://src.fedoraproject.org/rpms/whichfont.git /var/lib/mock/f45-build-38358-723/root/chroot_tmpdir/scmroot/whichfont
Cloning into '/var/lib/mock/f45-build-38358-723/root/chroot_tmpdir/scmroot/whichfont'...
$ git fetch origin 812a675bd82eda30b2684fdb488b13e7e8578ece:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/whichfont
 * [new ref]         812a675bd82eda30b2684fdb488b13e7e8578ece -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 812a675 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild