$ git clone -n https://src.fedoraproject.org/rpms/ghc-base64-bytestring.git /var/lib/mock/f40-build-775935-128521/root/chroot_tmpdir/scmroot/ghc-base64-bytestring
Cloning into '/var/lib/mock/f40-build-775935-128521/root/chroot_tmpdir/scmroot/ghc-base64-bytestring'...
$ git fetch origin 9802cf373ed251940ae6eb704bf54b6ab1d4f969:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-base64-bytestring
 * [new ref]         9802cf373ed251940ae6eb704bf54b6ab1d4f969 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9802cf3 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild