$ git clone -n https://src.fedoraproject.org/rpms/ghc-bifunctors.git /var/lib/mock/f45-build-10011-412/root/chroot_tmpdir/scmroot/ghc-bifunctors
Cloning into '/var/lib/mock/f45-build-10011-412/root/chroot_tmpdir/scmroot/ghc-bifunctors'...
$ git fetch origin 304da4ed10f634b395c53a28d098eeda2a76260a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-bifunctors
 * [new ref]         304da4ed10f634b395c53a28d098eeda2a76260a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 304da4e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild