$ git clone -n https://src.fedoraproject.org/rpms/ghc-transformers-base.git /var/lib/mock/f42-build-878165-180478/root/chroot_tmpdir/scmroot/ghc-transformers-base
Cloning into '/var/lib/mock/f42-build-878165-180478/root/chroot_tmpdir/scmroot/ghc-transformers-base'...
$ git fetch origin ffb9ca948ab3d3da42bd9d14bf8dd16b52a7631c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-transformers-base
 * [new ref]         ffb9ca948ab3d3da42bd9d14bf8dd16b52a7631c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffb9ca9 Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild