$ git clone -n https://src.fedoraproject.org/rpms/ghc-megaparsec.git /var/lib/mock/f45-build-10516-418/root/chroot_tmpdir/scmroot/ghc-megaparsec
Cloning into '/var/lib/mock/f45-build-10516-418/root/chroot_tmpdir/scmroot/ghc-megaparsec'...
$ git fetch origin 39b0f15a203b00f42a431689044f50b8b41e5268:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-megaparsec
 * [new ref]         39b0f15a203b00f42a431689044f50b8b41e5268 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39b0f15 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild