$ git clone -n https://src.fedoraproject.org/rpms/ghc-koji.git /var/lib/mock/f40-build-777464-129377/root/chroot_tmpdir/scmroot/ghc-koji
Cloning into '/var/lib/mock/f40-build-777464-129377/root/chroot_tmpdir/scmroot/ghc-koji'...
$ git fetch origin efb18c9b32be47a90b32b2f07d774f3c779cfffe:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-koji
 * [new ref]         efb18c9b32be47a90b32b2f07d774f3c779cfffe -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at efb18c9 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild