$ git clone -n https://src.fedoraproject.org/rpms/dovecot-fts-xapian.git /var/lib/mock/f42-build-861907-170476/root/chroot_tmpdir/scmroot/dovecot-fts-xapian
Cloning into '/var/lib/mock/f42-build-861907-170476/root/chroot_tmpdir/scmroot/dovecot-fts-xapian'...
$ git fetch origin 4458d4f2194ade25ae160e6dadc5598b882609a1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dovecot-fts-xapian
 * [new ref]         4458d4f2194ade25ae160e6dadc5598b882609a1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4458d4f Rebuild for ICU 76