$ git clone -n http://git.inferitos.ru/rpms/istack-commons /var/lib/mock/inferit-8_8-build-35371-71475/root/chroot_tmpdir/scmroot/istack-commons
Cloning into '/var/lib/mock/inferit-8_8-build-35371-71475/root/chroot_tmpdir/scmroot/istack-commons'...
$ git fetch origin changed/i8c/istack-commons-2.21-9.el8+7:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/istack-commons
 * [new tag]         changed/i8c/istack-commons-2.21-9.el8+7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 53a961b edit changelog for import istack-commons-2.21-9.el8+7