$ git clone -n https://src.fedoraproject.org/rpms/exo.git /var/lib/mock/f45-build-8548-390/root/chroot_tmpdir/scmroot/exo
Cloning into '/var/lib/mock/f45-build-8548-390/root/chroot_tmpdir/scmroot/exo'...
$ git fetch origin 99bca0cbf0381db91248dff596f4049658f740b0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/exo
 * [new ref]         99bca0cbf0381db91248dff596f4049658f740b0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 99bca0c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild