$ git clone -n https://src.fedoraproject.org/rpms/ghc-fixed.git /var/lib/mock/f40-build-776046-128585/root/chroot_tmpdir/scmroot/ghc-fixed
Cloning into '/var/lib/mock/f40-build-776046-128585/root/chroot_tmpdir/scmroot/ghc-fixed'...
$ git fetch origin 41455f99d9c68d3c1317772bef4eca0f8f1fc3a3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-fixed
 * [new ref]         41455f99d9c68d3c1317772bef4eca0f8f1fc3a3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 41455f9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild