$ git clone -n http://git.inferitos.ru/rpms/xapian-core /var/lib/mock/inferit-8_8-build-17676-23083/root/chroot_tmpdir/scmroot/xapian-core
Cloning into '/var/lib/mock/inferit-8_8-build-17676-23083/root/chroot_tmpdir/scmroot/xapian-core'...
$ git fetch origin changed/i8c/xapian-core-1.4.18-3.el8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/xapian-core
 * [new tag]         changed/i8c/xapian-core-1.4.18-3.el8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60de799 edit changelog for import xapian-core-1.4.18-3.el8