$ git clone -n https://src.fedoraproject.org/rpms/copyq.git /var/lib/mock/f40-build-1945617-25181/root/chroot_tmpdir/scmroot/copyq
Cloning into '/var/lib/mock/f40-build-1945617-25181/root/chroot_tmpdir/scmroot/copyq'...
$ git fetch origin 8abca3938618529c4dc8b7229442ffc057aa7fa2:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/copyq
 * [new ref]         8abca3938618529c4dc8b7229442ffc057aa7fa2 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8abca39 rhbz#2293794