$ git clone -n http://git.inferitos.ru/rpms/rtmpdump /var/lib/mock/inferit-8_9-extras-build-34379-66849/root/chroot_tmpdir/scmroot/rtmpdump
Cloning into '/var/lib/mock/inferit-8_9-extras-build-34379-66849/root/chroot_tmpdir/scmroot/rtmpdump'...
$ git fetch origin changed/i8cr/rtmpdump-2.4-15.20190330.gitc5f04a5.el8:KOJI_FETCH_HEAD
From http://git.inferitos.ru/rpms/rtmpdump
 * [new tag]         changed/i8cr/rtmpdump-2.4-15.20190330.gitc5f04a5.el8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d626e63 import rtmpdump-2.4-15.20190330.gitc5f04a5.el8