$ git clone -n https://src.fedoraproject.org/rpms/rubygem-vault.git /var/lib/mock/f40-build-2323646-58729/root/chroot_tmpdir/scmroot/rubygem-vault
Cloning into '/var/lib/mock/f40-build-2323646-58729/root/chroot_tmpdir/scmroot/rubygem-vault'...
$ git fetch origin 7ef2de3ca7d467877d26d37644745fd675530ea1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-vault
 * [new ref]         7ef2de3ca7d467877d26d37644745fd675530ea1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ef2de3 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild