$ git clone -n https://src.fedoraproject.org/rpms/python-avro.git /var/lib/mock/f42-build-3346766-45002/root/chroot_tmpdir/scmroot/python-avro
Cloning into '/var/lib/mock/f42-build-3346766-45002/root/chroot_tmpdir/scmroot/python-avro'...
$ git fetch origin 10420631118ba860de977a36589a2eab295e9369:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-avro
 * [new ref]         10420631118ba860de977a36589a2eab295e9369 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1042063 Initial import (fedora#2338087).