$ git clone -n https://src.fedoraproject.org/rpms/ghc-JuicyPixels.git /var/lib/mock/f40-build-2279725-55361/root/chroot_tmpdir/scmroot/ghc-JuicyPixels
Cloning into '/var/lib/mock/f40-build-2279725-55361/root/chroot_tmpdir/scmroot/ghc-JuicyPixels'...
$ git fetch origin 5ffe0cea1beda6fca22238a609378b67a114b80f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-JuicyPixels
 * [new ref]         5ffe0cea1beda6fca22238a609378b67a114b80f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5ffe0ce Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild