$ git clone -n https://src.fedoraproject.org/rpms/teg.git /var/lib/mock/f45-build-36908-709/root/chroot_tmpdir/scmroot/teg
Cloning into '/var/lib/mock/f45-build-36908-709/root/chroot_tmpdir/scmroot/teg'...
$ git fetch origin cddb6fa323fcb9208a7c3bc1f03f6bc4c2b410d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/teg
 * [new ref]         cddb6fa323fcb9208a7c3bc1f03f6bc4c2b410d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cddb6fa Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild