$ git clone -n https://src.fedoraproject.org/rpms/rust-assert-impl.git /var/lib/mock/f45-build-40201-769/root/chroot_tmpdir/scmroot/rust-assert-impl
Cloning into '/var/lib/mock/f45-build-40201-769/root/chroot_tmpdir/scmroot/rust-assert-impl'...
$ git fetch origin 5068754f890d47bc549ae0cbb846dcafbd4911b3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-assert-impl
 * [new ref]         5068754f890d47bc549ae0cbb846dcafbd4911b3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5068754 Regenerate with rust2rpm v28