$ git clone -n https://src.fedoraproject.org/rpms/ghc-sourcemap.git /var/lib/mock/f40-build-777142-129247/root/chroot_tmpdir/scmroot/ghc-sourcemap
Cloning into '/var/lib/mock/f40-build-777142-129247/root/chroot_tmpdir/scmroot/ghc-sourcemap'...
$ git fetch origin c4a660a9d24125740604ebc47d577a2647cfebf3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-sourcemap
 * [new ref]         c4a660a9d24125740604ebc47d577a2647cfebf3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c4a660a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild