$ git clone -n https://src.fedoraproject.org/rpms/389-ds-base.git /var/lib/mock/f40-build-780013-130656/root/chroot_tmpdir/scmroot/389-ds-base
Cloning into '/var/lib/mock/f40-build-780013-130656/root/chroot_tmpdir/scmroot/389-ds-base'...
$ git fetch origin 1e6b70d7c11c88198742a1301a306e3463d20077:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/389-ds-base
 * [new ref]         1e6b70d7c11c88198742a1301a306e3463d20077 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1e6b70d Rebuild for ICU 74