$ git clone -n https://src.fedoraproject.org/rpms/ghc.git /var/lib/mock/f40-build-2355725-60305/root/chroot_tmpdir/scmroot/ghc
Cloning into '/var/lib/mock/f40-build-2355725-60305/root/chroot_tmpdir/scmroot/ghc'...
$ git fetch origin 3797e2ad857c3632b57a7326c5f602a360144d2a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc
 * [new ref]         3797e2ad857c3632b57a7326c5f602a360144d2a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3797e2a Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild