$ git clone -n https://src.fedoraproject.org/rpms/ephemeral.git /var/lib/mock/f40-build-2435406-60780/root/chroot_tmpdir/scmroot/ephemeral
Cloning into '/var/lib/mock/f40-build-2435406-60780/root/chroot_tmpdir/scmroot/ephemeral'...
$ git fetch origin 02ff929d797b6965c35ab62f235e86305c36e0a6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ephemeral
 * [new ref]         02ff929d797b6965c35ab62f235e86305c36e0a6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 02ff929 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild