$ git clone -n https://src.fedoraproject.org/rpms/ghc-dotgen.git /var/lib/mock/f40-build-2665427-67099/root/chroot_tmpdir/scmroot/ghc-dotgen
Cloning into '/var/lib/mock/f40-build-2665427-67099/root/chroot_tmpdir/scmroot/ghc-dotgen'...
$ git fetch origin 17542243c6d89dcd61979e2044377b0ddc34827b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-dotgen
 * [new ref]         17542243c6d89dcd61979e2044377b0ddc34827b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1754224 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild