$ git clone -n https://src.fedoraproject.org/rpms/ghc-either.git /var/lib/mock/f40-build-777052-129193/root/chroot_tmpdir/scmroot/ghc-either
Cloning into '/var/lib/mock/f40-build-777052-129193/root/chroot_tmpdir/scmroot/ghc-either'...
$ git fetch origin 2fe0505e13c5c674a06b3cdb6b7f6d31ea6c0102:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-either
 * [new ref]         2fe0505e13c5c674a06b3cdb6b7f6d31ea6c0102 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2fe0505 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild