$ git clone -n https://src.fedoraproject.org/rpms/ghc-free.git /var/lib/mock/f40-build-2286210-55706/root/chroot_tmpdir/scmroot/ghc-free
Cloning into '/var/lib/mock/f40-build-2286210-55706/root/chroot_tmpdir/scmroot/ghc-free'...
$ git fetch origin b2abc16df119c99d9bbeafe9dcf547bdced8b927:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-free
 * [new ref]         b2abc16df119c99d9bbeafe9dcf547bdced8b927 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b2abc16 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild