$ git clone -n https://src.fedoraproject.org/rpms/ghc-erf.git /var/lib/mock/f40-build-776008-128553/root/chroot_tmpdir/scmroot/ghc-erf
Cloning into '/var/lib/mock/f40-build-776008-128553/root/chroot_tmpdir/scmroot/ghc-erf'...
$ git fetch origin 10fa28088b4d20211f160def6c5e02afcca4d80c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-erf
 * [new ref]         10fa28088b4d20211f160def6c5e02afcca4d80c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10fa280 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild