$ git clone -n https://src.fedoraproject.org/rpms/ghc-ObjectName.git /var/lib/mock/f40-build-2441380-60994/root/chroot_tmpdir/scmroot/ghc-ObjectName
Cloning into '/var/lib/mock/f40-build-2441380-60994/root/chroot_tmpdir/scmroot/ghc-ObjectName'...
$ git fetch origin 3c8ed0c93f87e4c454b7a789d2734d6ff2ea2988:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-ObjectName
 * [new ref]         3c8ed0c93f87e4c454b7a789d2734d6ff2ea2988 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c8ed0c Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild