$ git clone -n https://src.fedoraproject.org/rpms/ghc-JuicyPixels.git /var/lib/mock/f40-build-776933-129159/root/chroot_tmpdir/scmroot/ghc-JuicyPixels
Cloning into '/var/lib/mock/f40-build-776933-129159/root/chroot_tmpdir/scmroot/ghc-JuicyPixels'...
$ git fetch origin 141f8f54f87cf92e571f70618074fa20a864794a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-JuicyPixels
 * [new ref]         141f8f54f87cf92e571f70618074fa20a864794a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 141f8f5 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild