$ git clone -n https://src.fedoraproject.org/rpms/un-extra-fonts.git /var/lib/mock/f45-build-37700-717/root/chroot_tmpdir/scmroot/un-extra-fonts
Cloning into '/var/lib/mock/f45-build-37700-717/root/chroot_tmpdir/scmroot/un-extra-fonts'...
$ git fetch origin 73c481c3ff7a20004ed8ed114ae0cfc7070f21be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/un-extra-fonts
 * [new ref]         73c481c3ff7a20004ed8ed114ae0cfc7070f21be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 73c481c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild