$ git clone -n https://src.fedoraproject.org/rpms/ghc-lumberjack.git /var/lib/mock/f45-build-10501-418/root/chroot_tmpdir/scmroot/ghc-lumberjack
Cloning into '/var/lib/mock/f45-build-10501-418/root/chroot_tmpdir/scmroot/ghc-lumberjack'...
$ git fetch origin 119a182825632568632b0f6e816796fbe6b715af:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-lumberjack
 * [new ref]         119a182825632568632b0f6e816796fbe6b715af -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 119a182 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild