$ git clone -n https://src.fedoraproject.org/rpms/ghc-parsec-numbers.git /var/lib/mock/f45-build-10583-419/root/chroot_tmpdir/scmroot/ghc-parsec-numbers
Cloning into '/var/lib/mock/f45-build-10583-419/root/chroot_tmpdir/scmroot/ghc-parsec-numbers'...
$ git fetch origin f56126c78cef2cf5898387916e0a4262e8257608:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-parsec-numbers
 * [new ref]         f56126c78cef2cf5898387916e0a4262e8257608 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f56126c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild