$ git clone -n https://src.fedoraproject.org/rpms/wlroots.git /var/lib/mock/f45-build-38404-724/root/chroot_tmpdir/scmroot/wlroots
Cloning into '/var/lib/mock/f45-build-38404-724/root/chroot_tmpdir/scmroot/wlroots'...
$ git fetch origin e479909c1df4a952a384a21fa693aa6a3d772a83:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wlroots
 * [new ref]         e479909c1df4a952a384a21fa693aa6a3d772a83 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e479909 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild