$ git clone -n https://src.fedoraproject.org/rpms/erlang-poolboy.git /var/lib/mock/f45-build-8407-388/root/chroot_tmpdir/scmroot/erlang-poolboy
Cloning into '/var/lib/mock/f45-build-8407-388/root/chroot_tmpdir/scmroot/erlang-poolboy'...
$ git fetch origin c622a972e8d42324ac6a45d4d90d72bc1c8ba00e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/erlang-poolboy
 * [new ref]         c622a972e8d42324ac6a45d4d90d72bc1c8ba00e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c622a97 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild