$ git clone -n https://src.fedoraproject.org/rpms/ghc-temporary.git /var/lib/mock/f40-build-776871-129121/root/chroot_tmpdir/scmroot/ghc-temporary
Cloning into '/var/lib/mock/f40-build-776871-129121/root/chroot_tmpdir/scmroot/ghc-temporary'...
$ git fetch origin 06295acea05776d6b25ef9708664761bcfe280d9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-temporary
 * [new ref]         06295acea05776d6b25ef9708664761bcfe280d9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 06295ac Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild