$ git clone -n https://src.fedoraproject.org/rpms/ghc-hostname.git /var/lib/mock/f40-build-776054-128585/root/chroot_tmpdir/scmroot/ghc-hostname
Cloning into '/var/lib/mock/f40-build-776054-128585/root/chroot_tmpdir/scmroot/ghc-hostname'...
$ git fetch origin ea18e737571cc2fd8d2bb2f433a46f0bc5b4273c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hostname
 * [new ref]         ea18e737571cc2fd8d2bb2f433a46f0bc5b4273c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea18e73 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild