$ git clone -n https://src.fedoraproject.org/rpms/ghc-pem.git /var/lib/mock/f40-build-2666029-67104/root/chroot_tmpdir/scmroot/ghc-pem
Cloning into '/var/lib/mock/f40-build-2666029-67104/root/chroot_tmpdir/scmroot/ghc-pem'...
$ git fetch origin 17734bf44f0f447dea3b195f4638089c04ddc6be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-pem
 * [new ref]         17734bf44f0f447dea3b195f4638089c04ddc6be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 17734bf Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild